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A loophole in the EPA’s new sterilizer rule leaves warehouse workers vulnerable

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Friday, March 22, 2024

This story was produced in partnership with Atlanta News First. Thousands of warehouse workers across the U.S. are likely regularly exposed to the cancer-linked chemical ethylene oxide. More than half of the country’s medical equipment is sterilized with the compound, which the EPA considers a carcinogen. Ethylene oxide evaporates off the surface of these medical products after they’ve been sterilized, creating potentially dangerous concentrations of air pollution in the buildings where they’re stored. By and large, the EPA does not regulate these buildings — in fact, regulators don’t even know where most of them are. The Office of Safety and Health Administration, the federal agency in charge of worker protection that is known by its acronym, OSHA, has also done relatively little to evaluate worker exposure in these warehouses. But last week, OSHA opened a new investigation into a Georgia warehouse that stores medical devices sterilized with ethylene oxide, raising questions about whether the federal government is beginning to respond more quickly to these risks.  On March 13, the U.S. Marshals Service and the Douglas County sheriff’s office assisted OSHA in executing a search warrant at a warehouse leased by the medical device company ConMed in Lithia Springs, 17 miles west of Atlanta. The surprise inspection was initiated almost two weeks after a Grist and Atlanta News First investigation revealed that workers employed by ConMed had been unknowingly exposed to the chemical. Ambulances were routinely called to the facility as workers convulsed from seizures, lost consciousness, and had trouble breathing. The workers sued the company in 2020, but the lawsuit was ultimately dropped earlier this year after a judge dismissed some of their claims, citing state labor laws. (Under Georgia law, once employees seek workers’ compensation from the state, they are barred from suing employers separately.) ConMed denies the lawsuit’s allegations that it knowingly exposed workers to ethylene oxide and maintains that no individual medical emergency can be tied to exposure to the chemical. A company representative told Grist that it is “committed to fully complying” with all applicable regulations and conducts monthly ethylene oxide testing for its employees to review. “Given our many years of full cooperation with OSHA, as well as the fact that OSHA has inspected our Lithia Springs facility five times since 2019, ConMed was surprised by the manner in which OSHA elected to inspect the facility on March 13,” a company representative told Grist in an email. Ethylene oxide is a powerful fumigant, but it poses significant health risks and is linked to lung and breast cancers as well as diseases of the nervous system. Once medical devices are treated with ethylene oxide, the chemical continues to evaporate off the surface of the product as it moves through the supply chain. While the devices are trucked to warehouses, stored, and then shipped to hospitals, the products continue to quietly off-gas ethylene oxide, putting workers who come into contact with it at risk.  Read Next An invisible chemical is poisoning thousands of unsuspecting warehouse workers Naveena Sadasivam & Lylla Younes In a new rule it published last week, the EPA said that it will begin regulating toxic emissions from warehouses located on the same site as the sterilizer plants that actually apply the chemical. However, the agency argued that constraints stemming from the regulatory definition of the sterilization industry mean that offsite warehouses will be excluded from oversight. Even if the agency could clear that bureaucratic hurdle, it does not have “sufficient information to understand where these warehouses are located, who owns them, how they are operated, or what level of emissions potential they may have,” in the agency’s words. What little the EPA knows about the threat from offsite warehouses was gleaned from a study conducted by state regulators in Georgia. That effort initially identified seven off-site warehouses and found that at least one of the state’s warehouses was emitting more ethylene oxide than the sterilization plant that first treats the medical products before sending them out for storage. Federal officials will begin gathering data on warehouses, according to the new EPA rule, and use it to determine whether a completely new regulation governing storage facilities should be developed. Such a process could take years, according to experts who spoke to Grist. All the while, warehouse workers across the country will continue to inhale ethylene oxide, in many cases without their knowledge.  “Up until eight years ago, a lot of people had no idea that the sterilizer facility, which looks like your regular office park facility, was poisoning them,” said Marvin Brown, an attorney with the environmental nonprofit Earthjustice. “Now we have this additional issue of these warehouses that are continuing to poison people, and most people have no idea that they live next to one or work at one.” Brown and other experts Grist spoke to said the agency could take one of two approaches to regulating warehouses. It could expand the definition of regulated facilities under the sterilizer rule it finalized earlier this month, or it could create a new category of facilities that covers warehouses and develop a separate rule. Both come with challenges.  Reopening a new rule that has already been finalized is tricky, according to Scott Throwe, a former EPA enforcement official who worked on a number of rules that the EPA rolled out in the decade after amendments to the Clean Air Act were passed in 1990. “It’s a huge can of worms,” he said. “Once you open a rule, then you have to fix this and you have to fix this. It snowballs.” Alternatively, the EPA could draft a new rule entirely, he added, but the agency is unlikely to do that either, because of the sheer amount of effort such a process would take. Throwe said that the EPA’s decision not to include offsite warehouse regulations in its new rule means that the agency doesn’t have either the time, the resources, or the will to tackle those emissions at this time. “They’re going to declare victory on this one and move on,” he said. “They ain’t reopening that rule unless someone sues them.” A spokesperson for the EPA said that the agency has an “incomplete list” of warehouses and that it has not conducted any risk assessments of them. As a next step, the agency expects to follow up with sterilization companies that did not provide detailed information about the location of their warehouses in response to a 2021 request. Once those responses are received, the agency plans to conduct emissions testing at some of the warehouses. If the agency decides to pursue a separate rule for warehouses, that process could take four to five years, the spokesperson said.  More than 50 percent of all U.S. medical supplies are sterilized by ethylene oxide. Getty Images The rule governing medical sterilization facilities was one of the first industry-specific air quality regulations that the EPA ever crafted. In its amendments to the Clean Air Act in 1990, Congress published a list of 189 toxic air pollutants and asked the agency to develop regulations for each industry emitting at least one of them. Officials published the first standards for medical sterilizers in 1994 with little fanfare, according to Throwe. At the time, regulators and toxicologists were unaware of the true risks of ethylene oxide, which was used to fumigate a range of materials, from books to spices to cosmetics. With the new law giving the agency just a decade to craft dozens of new regulations, officials rushed the process, sacrificing the efficacy of some standards along the way. “It was like drinking from a firehose,” Throwe said. “Unrealistic statutory deadlines became court-ordered deadlines.” Drafting new regulations for a polluting industry, regulators quickly learned, was a lot of work. In addition to collecting and analyzing copious amounts of data on a particular type of plant’s emissions and configuration, officials had to consult engineering experts to understand what kinds of technologies they could ask companies to use to control their emissions. Decades later, the process for revising these regulations to better protect exposed communities is no different. It took the EPA almost a decade to publish its new sterilizer regulations, and it did so under a court-ordered due date after missing a previous deadline to update the rule. If the agency were to issue a new rule for warehouses, the time and resource commitment would be steep, Throwe said. While the EPA is not responsible for worker safety, it has found a roundabout way to increase protections for those coming in close contact with ethylene oxide. Since ethylene oxide is a fumigant, the agency is also pursuing separate oversight under a federal pesticide law. The Federal Insecticide, Fungicide, and Rodenticide Act requires the agency to evaluate pesticides every 15 years and determine where, how, and how much of a given pesticide may be used. In April, the EPA proposed a new set of requirements including reducing the amount of ethylene oxide used for sterilization and mandating that workers wear protective equipment while engaging in tasks where there is a high risk of exposure to the chemical. Since the law applies to all facilities where ethylene oxide is used — not just sterilization plants — warehouse workers could benefit from the requirements once it is finalized.   Some state and local agencies are proactively regulating warehouses themselves. After the Georgia Environmental Protection Division found that one warehouse was estimated to emit about nine times as much ethylene oxide as the facility that sterilized it, the agency began trying to find similarly dangerous warehouses. After scouring the internet and reaching out to companies, the agency identified four warehouses that were emitting more ethylene oxide than permitted under state law. The agency is now in the process of issuing permits and requiring controls for those facilities.  In Southern California, which has a large concentration of sterilization facilities, the local air quality regulator has included requirements for offsite warehouses in a rule that primarily targets sterilization plants. The rule categorizes warehouses into two tiers — those with an indoor space of 250,000 square feet or more and those with between 100,000 and 250,000 square feet. Depending on the size of the facility, the warehouses are subject to different reporting and monitoring requirements. In the course of developing the rule, the agency identified 28 warehouses that fall into one of these two tiers. The agency finalized the rule in December, and larger warehouses will be studied for a year to determine whether they emit significant amounts of ethylene oxide. Editor’s note: Earthjustice is an advertiser with Grist. Advertisers have no role in Grist’s editorial decisions. This story was originally published by Grist with the headline A loophole in the EPA’s new sterilizer rule leaves warehouse workers vulnerable on Mar 22, 2024.

"They’re going to declare victory on this one and move on."

This story was produced in partnership with Atlanta News First.

Thousands of warehouse workers across the U.S. are likely regularly exposed to the cancer-linked chemical ethylene oxide. More than half of the country’s medical equipment is sterilized with the compound, which the EPA considers a carcinogen. Ethylene oxide evaporates off the surface of these medical products after they’ve been sterilized, creating potentially dangerous concentrations of air pollution in the buildings where they’re stored.

By and large, the EPA does not regulate these buildings — in fact, regulators don’t even know where most of them are. The Office of Safety and Health Administration, the federal agency in charge of worker protection that is known by its acronym, OSHA, has also done relatively little to evaluate worker exposure in these warehouses. But last week, OSHA opened a new investigation into a Georgia warehouse that stores medical devices sterilized with ethylene oxide, raising questions about whether the federal government is beginning to respond more quickly to these risks. 

On March 13, the U.S. Marshals Service and the Douglas County sheriff’s office assisted OSHA in executing a search warrant at a warehouse leased by the medical device company ConMed in Lithia Springs, 17 miles west of Atlanta. The surprise inspection was initiated almost two weeks after a Grist and Atlanta News First investigation revealed that workers employed by ConMed had been unknowingly exposed to the chemical. Ambulances were routinely called to the facility as workers convulsed from seizures, lost consciousness, and had trouble breathing.

The workers sued the company in 2020, but the lawsuit was ultimately dropped earlier this year after a judge dismissed some of their claims, citing state labor laws. (Under Georgia law, once employees seek workers’ compensation from the state, they are barred from suing employers separately.) ConMed denies the lawsuit’s allegations that it knowingly exposed workers to ethylene oxide and maintains that no individual medical emergency can be tied to exposure to the chemical. A company representative told Grist that it is “committed to fully complying” with all applicable regulations and conducts monthly ethylene oxide testing for its employees to review.

“Given our many years of full cooperation with OSHA, as well as the fact that OSHA has inspected our Lithia Springs facility five times since 2019, ConMed was surprised by the manner in which OSHA elected to inspect the facility on March 13,” a company representative told Grist in an email.

Ethylene oxide is a powerful fumigant, but it poses significant health risks and is linked to lung and breast cancers as well as diseases of the nervous system. Once medical devices are treated with ethylene oxide, the chemical continues to evaporate off the surface of the product as it moves through the supply chain. While the devices are trucked to warehouses, stored, and then shipped to hospitals, the products continue to quietly off-gas ethylene oxide, putting workers who come into contact with it at risk. 

In a new rule it published last week, the EPA said that it will begin regulating toxic emissions from warehouses located on the same site as the sterilizer plants that actually apply the chemical. However, the agency argued that constraints stemming from the regulatory definition of the sterilization industry mean that offsite warehouses will be excluded from oversight. Even if the agency could clear that bureaucratic hurdle, it does not have “sufficient information to understand where these warehouses are located, who owns them, how they are operated, or what level of emissions potential they may have,” in the agency’s words.

What little the EPA knows about the threat from offsite warehouses was gleaned from a study conducted by state regulators in Georgia. That effort initially identified seven off-site warehouses and found that at least one of the state’s warehouses was emitting more ethylene oxide than the sterilization plant that first treats the medical products before sending them out for storage. Federal officials will begin gathering data on warehouses, according to the new EPA rule, and use it to determine whether a completely new regulation governing storage facilities should be developed. Such a process could take years, according to experts who spoke to Grist. All the while, warehouse workers across the country will continue to inhale ethylene oxide, in many cases without their knowledge. 

“Up until eight years ago, a lot of people had no idea that the sterilizer facility, which looks like your regular office park facility, was poisoning them,” said Marvin Brown, an attorney with the environmental nonprofit Earthjustice. “Now we have this additional issue of these warehouses that are continuing to poison people, and most people have no idea that they live next to one or work at one.”

Brown and other experts Grist spoke to said the agency could take one of two approaches to regulating warehouses. It could expand the definition of regulated facilities under the sterilizer rule it finalized earlier this month, or it could create a new category of facilities that covers warehouses and develop a separate rule. Both come with challenges. 

Reopening a new rule that has already been finalized is tricky, according to Scott Throwe, a former EPA enforcement official who worked on a number of rules that the EPA rolled out in the decade after amendments to the Clean Air Act were passed in 1990. “It’s a huge can of worms,” he said. “Once you open a rule, then you have to fix this and you have to fix this. It snowballs.”

Alternatively, the EPA could draft a new rule entirely, he added, but the agency is unlikely to do that either, because of the sheer amount of effort such a process would take. Throwe said that the EPA’s decision not to include offsite warehouse regulations in its new rule means that the agency doesn’t have either the time, the resources, or the will to tackle those emissions at this time.

“They’re going to declare victory on this one and move on,” he said. “They ain’t reopening that rule unless someone sues them.”

A spokesperson for the EPA said that the agency has an “incomplete list” of warehouses and that it has not conducted any risk assessments of them. As a next step, the agency expects to follow up with sterilization companies that did not provide detailed information about the location of their warehouses in response to a 2021 request. Once those responses are received, the agency plans to conduct emissions testing at some of the warehouses. If the agency decides to pursue a separate rule for warehouses, that process could take four to five years, the spokesperson said. 

Stock photo of a surgical tray containing medical equipment
More than 50 percent of all U.S. medical supplies are sterilized by ethylene oxide. Getty Images

The rule governing medical sterilization facilities was one of the first industry-specific air quality regulations that the EPA ever crafted. In its amendments to the Clean Air Act in 1990, Congress published a list of 189 toxic air pollutants and asked the agency to develop regulations for each industry emitting at least one of them. Officials published the first standards for medical sterilizers in 1994 with little fanfare, according to Throwe. At the time, regulators and toxicologists were unaware of the true risks of ethylene oxide, which was used to fumigate a range of materials, from books to spices to cosmetics. With the new law giving the agency just a decade to craft dozens of new regulations, officials rushed the process, sacrificing the efficacy of some standards along the way.

“It was like drinking from a firehose,” Throwe said. “Unrealistic statutory deadlines became court-ordered deadlines.”

Drafting new regulations for a polluting industry, regulators quickly learned, was a lot of work. In addition to collecting and analyzing copious amounts of data on a particular type of plant’s emissions and configuration, officials had to consult engineering experts to understand what kinds of technologies they could ask companies to use to control their emissions. Decades later, the process for revising these regulations to better protect exposed communities is no different. It took the EPA almost a decade to publish its new sterilizer regulations, and it did so under a court-ordered due date after missing a previous deadline to update the rule. If the agency were to issue a new rule for warehouses, the time and resource commitment would be steep, Throwe said.

While the EPA is not responsible for worker safety, it has found a roundabout way to increase protections for those coming in close contact with ethylene oxide. Since ethylene oxide is a fumigant, the agency is also pursuing separate oversight under a federal pesticide law. The Federal Insecticide, Fungicide, and Rodenticide Act requires the agency to evaluate pesticides every 15 years and determine where, how, and how much of a given pesticide may be used. In April, the EPA proposed a new set of requirements including reducing the amount of ethylene oxide used for sterilization and mandating that workers wear protective equipment while engaging in tasks where there is a high risk of exposure to the chemical. Since the law applies to all facilities where ethylene oxide is used — not just sterilization plants — warehouse workers could benefit from the requirements once it is finalized.  

Some state and local agencies are proactively regulating warehouses themselves. After the Georgia Environmental Protection Division found that one warehouse was estimated to emit about nine times as much ethylene oxide as the facility that sterilized it, the agency began trying to find similarly dangerous warehouses. After scouring the internet and reaching out to companies, the agency identified four warehouses that were emitting more ethylene oxide than permitted under state law. The agency is now in the process of issuing permits and requiring controls for those facilities. 

In Southern California, which has a large concentration of sterilization facilities, the local air quality regulator has included requirements for offsite warehouses in a rule that primarily targets sterilization plants. The rule categorizes warehouses into two tiers — those with an indoor space of 250,000 square feet or more and those with between 100,000 and 250,000 square feet. Depending on the size of the facility, the warehouses are subject to different reporting and monitoring requirements. In the course of developing the rule, the agency identified 28 warehouses that fall into one of these two tiers. The agency finalized the rule in December, and larger warehouses will be studied for a year to determine whether they emit significant amounts of ethylene oxide.

Editor’s note: Earthjustice is an advertiser with Grist. Advertisers have no role in Grist’s editorial decisions.

This story was originally published by Grist with the headline A loophole in the EPA’s new sterilizer rule leaves warehouse workers vulnerable on Mar 22, 2024.

Read the full story here.
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California governor under pressure over bill to ban cookware made with Pfas

Gavin Newsom, who has vetoed environmental bills before, feeling push from industry and celebrity chefs on next stepsGavin Newsom, the California governor, is facing intense pressure from industry, and even some celebrity chefs, as he weighs whether or not to sign a bill that bans the sale of cookware made with Pfas or “forever chemicals”.The legislation, approved by the California legislature on 12 September, comes as Newsom contemplates a run for the Democratic presidential nomination, heightening the scrutiny of his decision. Continue reading...

Gavin Newsom, the California governor, is facing intense pressure from industry, and even some celebrity chefs, as he weighs whether or not to sign a bill that bans the sale of cookware made with Pfas or “forever chemicals”.The legislation, approved by the California legislature on 12 September, comes as Newsom contemplates a run for the Democratic presidential nomination, heightening the scrutiny of his decision.The industry pressure is part of a broader attack that aims to derail similar bans on Pfas in cookware in other states, public health advocates say. Newsom has a history of vetoing some environmental bills around toxic chemicals, including a ban on Pfas in household cleaners and artificial turf that were made amid similar industry pressure. But advocates say they have worked with the administration to address concerns.“Industry is putting so much pressure on Newsom, and they’re doing it in the press, scaring the public and high profile people are writing to him saying the sky will fall,” said Andria Ventura, legislative director for Clean Water Action, which has lobbied for the bills. “We’re not sure where he’ll land on this.”Newsom’s office did not immediately respond to a request for comment. He has until 13 October to veto the bill.Pfas are a class of about 16,000 chemicals most frequently used to make products water-, stain- and grease-resistant. The compounds have been linked to cancer, birth defects, decreased immunity, high cholesterol, kidney disease and a range of other serious health problems. They are dubbed “forever chemicals” because they do not naturally break down in the environment.The Cookware Sustainability Alliance, a trade group founded by two of the world’s largest cookware manufacturers, Groupe SEB and Meyer, is leading the charge against the ban. Steve Burns, a lobbyist from the group, said he is particularly concerned about restaurants that use Pfas throughout the kitchen.“Some of the top chefs in the nation rely on nonstick,” he said. “They need this in their restaurants.”Burns claimed butter and oil used in pans is more unhealthy than Ptfe exposure and said the cookware industry is unfairly maligned because it did not create the chemicals.“We’re two steps removed yet we’re the ones who are being held accountable,” Burns said.Chefs who have come out in opposition to the bill include Thomas Keller, David Chang and Rachael Ray – each has had cookware lines that could take a financial hit from the ban. That has drawn criticism from actor and anti-Pfas activist Mark Ruffalo, who supports the ban.The state’s legislature is the seventh to pass a ban on the sale of Pfas in cookware, and is part of a package that would prohibit the chemicals’ use in six product categories. State legislatures across the US have proposed hundreds of limits on Pfas’s use in consumer goods in recent years, which is pressuring companies to move away from the often dangerous chemicals in non-essential uses.“These are avoidable uses of Pfas that we can eliminate now,” said Avi Kar, senior director of the toxics program at the Natural Resources Defense Council, which is lobbying in support of the bill. “Pfas is such a large problem and we need to do everything we can to reduce exposures. This is a clear cut case, and there are already alternatives, so it’s not going to cause hardship.”Advocates say they worked with industry in other product categories but only cookware makers were hostile toward legislation. The industry previously sued in federal court in an attempt to overturn a similar ban in Minnesota, but the suit was dismissed.skip past newsletter promotionSign up to Detox Your KitchenA seven-week expert course to help you avoid chemicals in your food and groceries.Privacy Notice: Newsletters may contain information about charities, online ads, and content funded by outside parties. If you do not have an account, we will create a guest account for you on theguardian.com to send you this newsletter. You can complete full registration at any time. For more information about how we use your data see our Privacy Policy. We use Google reCaptcha to protect our website and the Google Privacy Policy and Terms of Service apply.after newsletter promotionSimilar tactics and claims are being deployed in California. Industry has said, without providing firm evidence, that the bans caused cookware shortages on store shelves. Maine was among the first states to ban Pfas in cookware and the industry has claimed brides in the state are upset because they can’t get Teflon pans on their registries, advocates say.Pfas compounds like Ptfe, also called Teflon, are most commonly used in pans and industry has claimed the chemical is safe and should not be classified as a Pfas. New Mexico exempted Ptfe from its cookware ban, but most governments classify it as a Pfas and regulate it. While science suggests Ptfe poses less of a health threat in isolation than other more dangerous Pfas, some peer-reviewed research highlights risks throughout its life cycle.Highly toxic Pfas are used to manufacture Ptfe, and the former can end up in the environment or leftover on a pan. When Ptfe cookware is scratched or chipped, it can shed micro- or nanoplastics into food. Research has linked Ptfe in combination with other microplastics to decreased sperm quality, among other health issues, and Ptfe fumes emitted from a pan can cause flu-like symptoms.Ventura noted the California water and sewer utility trade group endorses the ban because utilities are left with the cost of trying to remove PFAS pollution from drinking water.Industry has also run ads in California claiming the state is in a cost-of-living crisis, and the ban would force families to spend more than $300 buying new pots and pans. In one ad that ran on Instagram, a woman standing in a kitchen states that she can’t afford to buy new pans.But Ventura noted the ban only covers selling new cookware with Pfas and wouldn’t prohibit owning the products or buying them out of state. Though industry claims alternatives are more expensive, most companies also make stainless steel, cast iron or nonstick ceramic products, and many are the same price.“All you have to do is walk into a Marshalls or Macy’s and you can see they’re the same price, and the companies are making the alternatives,” Ventura said. “Nobody is going to go into your house or the kitchen of your restaurant and take away [the Teflon pans].”

Industrial Chemical Linked To Parkinson's Disease

By Dennis Thompson HealthDay ReporterTHURSDAY, Oct. 2, 2025 (HealthDay News) — Long-term exposure to a chemical used in metal degreasing and dry...

By Dennis Thompson HealthDay ReporterTHURSDAY, Oct. 2, 2025 (HealthDay News) — Long-term exposure to a chemical used in metal degreasing and dry cleaning might increase the risk of Parkinson’s disease, a new study says.Seniors living in places with the highest airborne levels of trichloroethylene showed a 10% higher risk for Parkinson’s than those in areas with the lowest levels, researchers report in the journal Neurology.Further, risk of Parkinson’s increased fourfold for people living one to five miles downwind of an Oregon factory that used the chemical, researchers found.“Long-term exposure to trichloroethylene in outdoor air was associated with a small but measurable increase in Parkinson’s risk,” said lead researcher Brittany Krzyzanowski, an assistant professor at the Barrow Neurological Institute in Phoenix.“These findings add to a growing body of evidence that environmental exposures may contribute to Parkinson’s disease,” she said in a news release.Trichloroethylene (TCE) is known to cause kidney cancer, and studies have linked the chemical to blood cancers and liver cancer, according to the National Cancer Institute.It’s a persistent environmental pollutant in air, water and soil across the United States, researchers noted. A 2000 U.S. Environmental Protection Agency  (EPA) report estimated that up to 30% of the nation’s drinking water supplies were contaminated with TCE. In 2024, the EPA issued a ban on the chemical for all consumer and commercial uses that was set to start in 2025. However, the ban was stayed pending a legal challenge, and the chemical remains in use.For the new study, researchers used Medicare data to identify seniors older than 67 newly diagnosed with Parkinson’s between 2016 and 2018, and compared each participant to five other seniors who didn’t have the disease.Parkinson’s occurs when brain cells that produce the neurotransmitter dopamine either die or become impaired. When that happens, people start to have movement problems that include shaking, stiffness, and difficulty with balance and coordination, according to Cleveland Clinic.All told, the study included nearly 222,000 people with Parkinson’s and more than 1.1 million people without the disease, researchers said.Using ZIP codes and EPA data, researchers mapped everyone’s exposure to outdoor TCE concentrations two years prior to their diagnosis.Researchers concluded that people exposed to the highest levels of TCE appeared to have a greater risk of Parkinson’s, after controlling for other risk factors for the disorder.“While the increased risk was modest, the sheer number of people exposed to TCE in the environment means the potential public health impact could be substantial,” Krzyzanowski said.The team also identified several geographic “hot spots” where outdoor TCE levels were highest, particularly in the Rust Belt region, as well as three facilities that operated as the nation’s top TCE-emitting facilities in 2002.Results showed that Parkinson’s risk was higher close to two of the three facilities. At one of those sites, Parkinson’s risk clearly rose the closer people lived to the facility. People living one to five miles downwind from a lithium battery plant in Lebanon, Oregon, had a more than four times greater risk of Parkinson’s than those living up to 10 miles away.“This underscores the need for stronger regulations and more monitoring of industrial pollutants,” Krzyzanowski said.The researchers noted that their study could not draw a direct cause-and-effect link between TCE and Parkinson’s. Their results only show an association.However, previous reports have also linked TCE to Parkinson’s, researchers said.For example, TCE contamination of the drinking water at Camp Lejeune, a Marine Corps base in Jacksonville, N.C., has been linked with a 70% higher risk of Parkinson’s among service members stationed there.SOURCES: American Academy of Neurology, news release, Oct. 1, 2025; Neurology, Oct. 1, 2025Copyright © 2025 HealthDay. All rights reserved.

Why Is This Remote and Rugged River in Alaska Turning Orange?

New research suggests the Salmon River is full of toxic metals that are likely harming fish and other aquatic creatures

Why Is This Remote and Rugged River in Alaska Turning Orange? New research suggests the Salmon River is full of toxic metals that are likely harming fish and other aquatic creatures Sarah Kuta - Daily Correspondent October 1, 2025 4:56 p.m. New research suggests that the Salmon River in northwest Alaska is full of toxic metals. Ray Koleser Alaska’s Salmon River was once so clean that author John McPhee described it as the “clearest, purest water I have ever seen flowing over rocks.” Now, however, the remote waterway is a muddy, orangish-yellow mess. It’s brimming with toxic metals, at concentrations that are likely harmful to aquatic life. The culprit? Thawing permafrost resulting from climate change, according to a study published in the journal Proceedings of the National Academy of Sciences last month. “It’s a sobering study,” says Diane McKnight, a geochemist at the University of Colorado Boulder who was not involved with the research, to Chemical & Engineering News’ Fionna Samuels. The Salmon River winds 70 miles through Kobuk Valley National Park in northwest Alaska, flowing from Mount Angayukaqsraq to the Kobuk River. The federal government designated it a National Wild and Scenic River in 1980, noting its large salmon runs and its “water of exceptional clarity.” However, around 2019, the once-crystal-clear waters of the Salmon River and its tributaries turned orange and murky. Patrick Sullivan, an ecologist at the University of Alaska Anchorage, and Roman Dial, a now-retired biologist at Alaska Pacific University, first noticed the unusual hue during an unrelated research trip in the region. Fun Fact Alaska archaeology Alaska is home to the oldest known evidence of salmon fishing in the Americas—11,500-year-old fish bones. The Salmon River had become what’s known as a “rusting river,” a phenomenon caused by the presence of high amounts of iron and other metals. Sullivan, Dial and their colleagues returned to the waterway to take samples in 2022 and 2023. Based on their analyses, they suspect it has fallen victim to sulfide mineral weathering, also known as acid-rock drainage, which can occur when permafrost thaws. Found primarily in the Arctic and some high-elevation regions, permafrost is the name given to soil, sand, sediment and rock that remains at or below freezing temperatures for at least two years. The bedrock beneath some permafrost contains sulfide minerals, which are typically inaccessible to groundwater. However, when permafrost thaws, those minerals become exposed to water and oxygen for the first time in hundreds or even thousands of years. As the minerals dissolve, they produce acids, which in turn cause metals to leach out of rocks. In this way, acid-rock drainage is a form of natural pollution that can occur far from humans—even though it’s caused by human activity. “There are few places left on Earth as untouched as these rivers,” says co-author Tim Lyons, a geochemist at the University of California Riverside, to BBC Wildlife Magazine’s Daniel Graham. “But even here, far from cities and highways, the fingerprint of global warming is unmistakable. No place is spared.” The team’s analyses show the Salmon River is chock-full of metals—including aluminum, cadmium, copper, iron, nickel, and zinc—at concentrations above the U.S. Environmental Protection Agency’s safe limits for aquatic life. “If there were a mine that were operating in the headwaters of the Salmon, they would be facing regulatory intervention at this point,” Sullivan tells Chemical & Engineering News. Pollution from mines is typically limited to a single source and can be managed with treatment systems. Acid-rock drainage caused by permafrost thaw, on the other hand, is occurring at various sites and is nearly impossible to mitigate, the researchers say. “The only hope for solving this problem…is the recovery of the permafrost, which of course would involve pretty massive emissions reductions at this point,” Sullivan tells Chemical & Engineering News. And the ripple effects of permafrost thaw are not limited to the Salmon River. The process can occur in any waterway located near permafrost covering sulfide-rich bedrock, and scientists are using satellite imagery to look for other rivers and streams that might be affected. The high levels of toxic metals in the Salmon River might help explain a recent drop in the number of chum salmon returning to spawn, the researchers say. But, they add, they need to conduct more research to confirm that hunch. Even if the pollution is not to blame for the depressed salmon runs, it’s likely still affecting the local food chain. “It would be very hard, for instance, for a bear to fish for a salmon just because of the turbidity,” Sullivan tells the Alaska Beacon’s Yereth Rosen. “Raptors would have a really hard time catching a fish if they were fishing there.” The water is simply too cloudy, he says, citing his own failed attempts to fish the river. The metals also seem to be harming aquatic insects, such as stoneflies and mayflies, a source of food for many fish, per Science’s Warren Cornwall. In parts of the Salmon River with high levels of aluminum and iron, for instance, the scientists found very few insect larvae. “We have no idea when that process might reach its conclusion and how many new acid seeps might develop,” Sullivan tells the Alaska Beacon. Get the latest stories in your inbox every weekday.

Bills Target Crucitas Gold Mining Mess in Costa Rica

Crucitas ranks among Costa Rica’s most severe environmental setbacks. Illegal gold mining has ravaged the area for years, bringing crime, community unrest, water pollution, and deaths among those risking their lives in unauthorized operations. The once-rich natural zone now shows clear signs of decline, with forests cleared and rivers tainted by chemicals. Recent events highlight […] The post Bills Target Crucitas Gold Mining Mess in Costa Rica appeared first on The Tico Times | Costa Rica News | Travel | Real Estate.

Crucitas ranks among Costa Rica’s most severe environmental setbacks. Illegal gold mining has ravaged the area for years, bringing crime, community unrest, water pollution, and deaths among those risking their lives in unauthorized operations. The once-rich natural zone now shows clear signs of decline, with forests cleared and rivers tainted by chemicals. Recent events highlight the ongoing trouble. Just this month, authorities detained five Nicaraguans for illegal mining, and earlier, two young brothers from Nicaragua died when a tunnel collapsed on them. Rescue teams recovered their bodies after hours of work, a grim reminder of the dangers. These incidents add to a long list of fatalities, as people cross borders chasing gold amid poverty. Lawmakers in the Legislative Assembly are pushing several bills to tackle this mess. The government’s plan stands out—it would permit gold exploration and extraction in Crucitas to curb the chaos from illegal activities. The Alajuela Commission gave it a green light on September 11 with an 8-1 vote, sending it to the full assembly for debate. It awaits scheduling, and motions could still alter it. Supporters argue that regulated mining would bring order, generate jobs, and fund cleanup, but critics question the fit with Costa Rica’s eco-friendly reputation. Open-pit methods, which the bill would allow under strict rules, carry heavy costs. They strip away land, wipe out habitats, and reduce plant and animal diversity. Air gets dusty, water sources shift or get contaminated, and noise drives away wildlife. Communities nearby face health risks from pollutants, as seen already in Crucitas where mercury and cyanide have seeped into streams. Despite bans since 2010, illegal digs persist, often tied to organized groups, making the site a hotspot for violence and smuggling. Another bill, backed by the Frente Amplio party and the Civic Environmental Parliament, takes a different path. It proposes a Sustainable Development Hub for the Huetar Norte region, focusing on recovery without mining. At its core is the Crucitas International Environmental Geopark, covering wooded hills between Fortuna and Botija. A natural and historical museum would join it, highlighting the area’s past and ecology. This approach draws from UNESCO geoparks, with 13 already in Latin America, including one in Nicaragua. Costa Rica’s planning ministry has approved a similar site in Rio Cuarto. The idea is to protect resources while allowing research and low-key recreation. No gold digging permitted—that aligns with the country’s green identity. The hub would put the National System of Conservation Areas in charge of oversight. Locals could run small-scale businesses with support from the Development Bank and rural agencies. Educational programs through the National Learning Institute and universities would train people, creating opportunities on the ground. Tax breaks aim to attract private projects that fit the goals, like eco-tourism or studies. A key part involves cleaning up the damage. Remediation targets the toxins left behind, aiming to restore soil and water. Some still push for mining as the fix, claiming it would stop illegals and boost the economy, but that ignores the added harm to an already battered spot. The debate boils down to priorities: quick cash from gold versus long-term protection. Costa Rica has built its image on sustainability, drawing tourists to parks and beaches. Reopening to mining could shift that, while the hub option builds on strengths in conservation. As bills move forward, locals watch closely, hoping for a solution that heals rather than harms. The post Bills Target Crucitas Gold Mining Mess in Costa Rica appeared first on The Tico Times | Costa Rica News | Travel | Real Estate.

Extraordinary pictures show what a common antibiotic does to E. coli

A commonly used class of antibiotics seems to kill bacteria like E. coli by breaking down their tough armour

The top image shows an untreated E.coli bacterium; the bottom shows a bacterium after 90 minutes of being exposed to the antibiotic polymyxin BCarolina Borrelli, Edward Douglas et al./Nature Microbiology The way antibiotics called polymyxins pierce the armour of bacteria has been revealed in stunning detail by high-resolution microscopy, which could help us develop new treatments for drug-resistant infections. Polymyxins are commonly used as a last-resort treatment against some so-called gram-negative bacteria, which can cause infections such as pneumonia, meningitis and typhoid fever. “The top three World Health Organization priority pathogens are all gram-negative bacteria, and this is largely a reflection of their complex cell envelope,” says Andrew Edwards at Imperial College London. Around their inner cell, these bacteria have an outer surface layer containing molecules called lipopolysaccharides, which act like armour. We knew polymyxins target this outer layer, but how exactly they disrupt it and then kill bacteria wasn’t understood; neither was why the drugs don’t always work. Now, Edwards and his colleagues have used biochemical experiments and atomic force microscopy – in which a needle just a few nanometres wide creates an image of a cell by sensing its shape – to reveal that one of the two types of polymyxin used therapeutically, called polymyxin B, causes strange bulges to break out on the surface of the gram-negative bacterium E. coli. Minutes after the protrusions appear, the bacterium begins to quickly shed its lipopolysaccharides, which the researchers detected in the solution it was in. The researchers say the antibiotic’s presence triggers the bacterium to try to put more and more “bricks” of lipopolysaccharide in its defensive wall. But as it adds bricks, it is also shedding some, temporarily leaving gaps in its defences that allow the antibiotic to enter and kill it. “The antibiotics are a bit like a crowbar that helps these bricks come out of the wall,” says Edwards. “The outer membrane doesn’t disintegrate; it doesn’t fall off. But there are clearly gaps where the antibiotic can then get to the second membrane.” He and his colleagues also uncovered why the antibiotic doesn’t always work: it only affected bacteria that were active and growing. When bacteria were dormant, a state they can enter to survive environmental stress such as nutrient deprivation, the polymyxin B was ineffective, because it wasn’t producing its armour. Images of E. coli exposed to polymyxin B, showing changes to the outer layer of its membrane, from left to right: untreated; bacterium after 15 minutes of antibiotic exposure; after 30 minutes; after 60 minutes; after 90 minutesCarolina Borrelli, Edward Douglas et al. / Nature Microbiology However, the researchers found that providing sugar to the E. coli cells woke them from this dormant state and, within 15 minutes, armour production resumed and the cells were killed. The same is expected to apply to the other polymyxin antibiotic used therapeutically, polymyxin E. Edwards says it might be possible to target dormant bacteria by giving people sugars, but there are dangers to waking these pathogens from their dormant state. “You don’t necessarily want bacteria at an infection site to start multiplying rapidly because that has its own downsides,” he says. Instead, he adds, it might be possible to combine different drugs to bypass the hibernation state without waking the bacteria up.

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