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Air, Light Pollution Increase Risk Of Thyroid Cancer In Children

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Friday, April 18, 2025

By Dennis Thompson HealthDay ReporterFRIDAY, April 18, 2025 (HealthDay News) -- Babies exposed to air and light pollution have a higher risk of developing childhood thyroid cancer, a new study says.Airborne particle pollution and outdoor artificial light both increased babies’ risk of developing thyroid cancer before they turned 20, researchers recently reported in the journal Environmental Health Perspectives.“These results are concerning, especially given how widespread both of these exposures are,” lead researcher Nicole Deziel, an environmental epidemiologist at the Yale School of Public Health, said in a news release.“Fine particulate matter is found in urban air pollution due to automobile traffic and industrial activity, and artificial light at night is common, particularly in densely populated urban areas,” she added.Both fine particle pollution and light pollution are considered environmental carcinogens that disrupt the body’s endocrine system, including thyroid function, researchers said in background notes.Particle pollution pose a threat because they’re small enough to enter the bloodstream. The airborne particles can be smaller than 2.5 micrometers, while a human hair is 50 to 70 micrometers wide, according to the U.S. Environmental Protection Agency (EPA).And outdoor artificial light can suppress melatonin and alter a person’s sleep/wake rhythm, which also influences hormone-regulated cancers, researchers said.For the study, researchers compared data from 736 young people diagnosed with thyroid cancer before age 20 with that from 36,800 healthy kids, all of whom hail from California.The team assessed the cancer patients’ exposure to air and light pollution based on their families’ home address when they were born.Results showed that for every 10 micrograms per cubic meter increase in particle pollution, a child’s odds of developing thyroid cancer rose by 7% overall.The strongest associations between air pollution and thyroid cancer were found among 15- to 19-year-olds (8% increased risk) and Hispanic children (13% increased risk), researchers said.Likewise, children born in areas with high levels of outdoor artificial light were as much as 25% more likely to develop thyroid cancer."Thyroid cancer is among the fastest growing cancers among children and adolescents, yet we know very little about what causes it in this population," Deziel said."Our study is the first large-scale investigation to suggest that these exposures early in life — specifically to PM2.5 and outdoor light at night — may play a role in this concerning trend,” she added.Compared to adults, children are often diagnosed with thyroid cancer at more advanced stages, with larger and harder-to-treat tumors, researchers said.Even if kids survive thyroid cancer, they can suffer aftereffects like headaches, physical disabilities and mental fatigue that will haunt them throughout their lives, researchers said.Researchers emphasized that more work is needed to replicate and validate their findings.“In the meantime,” Deziel noted, “our results point to the critical importance of addressing environmental factors in childhood cancer research. Reducing exposures to air pollution and managing light pollution could be important steps in protecting children's health.”SOURCE: Yale School of Public Health, news release, April 15, 2025Copyright © 2025 HealthDay. All rights reserved.

By Dennis Thompson HealthDay ReporterFRIDAY, April 18, 2025 (HealthDay News) -- Babies exposed to air and light pollution have a higher risk of...

By Dennis Thompson HealthDay Reporter

FRIDAY, April 18, 2025 (HealthDay News) -- Babies exposed to air and light pollution have a higher risk of developing childhood thyroid cancer, a new study says.

Airborne particle pollution and outdoor artificial light both increased babies’ risk of developing thyroid cancer before they turned 20, researchers recently reported in the journal Environmental Health Perspectives.

“These results are concerning, especially given how widespread both of these exposures are,” lead researcher Nicole Deziel, an environmental epidemiologist at the Yale School of Public Health, said in a news release.

“Fine particulate matter is found in urban air pollution due to automobile traffic and industrial activity, and artificial light at night is common, particularly in densely populated urban areas,” she added.

Both fine particle pollution and light pollution are considered environmental carcinogens that disrupt the body’s endocrine system, including thyroid function, researchers said in background notes.

Particle pollution pose a threat because they’re small enough to enter the bloodstream. The airborne particles can be smaller than 2.5 micrometers, while a human hair is 50 to 70 micrometers wide, according to the U.S. Environmental Protection Agency (EPA).

And outdoor artificial light can suppress melatonin and alter a person’s sleep/wake rhythm, which also influences hormone-regulated cancers, researchers said.

For the study, researchers compared data from 736 young people diagnosed with thyroid cancer before age 20 with that from 36,800 healthy kids, all of whom hail from California.

The team assessed the cancer patients’ exposure to air and light pollution based on their families’ home address when they were born.

Results showed that for every 10 micrograms per cubic meter increase in particle pollution, a child’s odds of developing thyroid cancer rose by 7% overall.

The strongest associations between air pollution and thyroid cancer were found among 15- to 19-year-olds (8% increased risk) and Hispanic children (13% increased risk), researchers said.

Likewise, children born in areas with high levels of outdoor artificial light were as much as 25% more likely to develop thyroid cancer.

"Thyroid cancer is among the fastest growing cancers among children and adolescents, yet we know very little about what causes it in this population," Deziel said.

"Our study is the first large-scale investigation to suggest that these exposures early in life — specifically to PM2.5 and outdoor light at night — may play a role in this concerning trend,” she added.

Compared to adults, children are often diagnosed with thyroid cancer at more advanced stages, with larger and harder-to-treat tumors, researchers said.

Even if kids survive thyroid cancer, they can suffer aftereffects like headaches, physical disabilities and mental fatigue that will haunt them throughout their lives, researchers said.

Researchers emphasized that more work is needed to replicate and validate their findings.

“In the meantime,” Deziel noted, “our results point to the critical importance of addressing environmental factors in childhood cancer research. Reducing exposures to air pollution and managing light pollution could be important steps in protecting children's health.”

SOURCE: Yale School of Public Health, news release, April 15, 2025

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Environmental Agency Denies Petition to Designate Big Hole River as Impaired by Nutrient Pollution

Montana’s environmental regulator has denied a petition to designate the Big Hole River as impaired by nitrogen and phosphorus

Montana’s environmental regulator has denied a petition to designate the Big Hole River as impaired by nitrogen and phosphorus, throwing a wrench in environmentalists’ efforts to put the blue-ribbon fishery on a “pollution diet.”Upper Missouri Waterkeeper and the Big Hole River Foundation contend that excess nutrients are creating regular summertime algal blooms that can stretch for more than a mile, robbing fish and the macroinvertebrate bugs they eat of the oxygen they need to thrive. The groups argue in the petition they sent to the Montana Department of Environmental Quality last month that an impairment designation would direct the agency to identify and work to reduce the river’s pollution sources in an effort to rebalance the river’s aquatic ecosystem.On April 14, about a month after receiving the 32-page petition, DEQ wrote that it “cannot grant” the group’s petition. The agency’s letter doesn’t quibble with the groups’ findings, which were detailed in a five-year data collection effort. Instead, the agency suggested that legislation passed in 2021 has tied its hands. “As a result of Senate Bill 358, passed during the 2021 Legislative Session … DEQ is unable to base nutrient assessment upon the numeric nutrient criteria,” the letter, signed by DEQ Director Sonja Nowakowski, reads. In an April 23 conversation with Montana Free Press, Upper Missouri Waterkeeper Executive Director Guy Alsentzer criticized the agency’s decision, arguing that it did not use the best available science and applied “illogical and disingenuous” reasoning in its denial. “EPA already took action and struck down Senate Bill 358 from the 2021 session,” Alsentzer said, referencing federal regulators’ oversight of state laws and rules governing water quality. “Numeric criteria are applicable.”A spokesperson for the EPA confirmed Alsentzer’s assertion, writing in an April 24 email to MTFP that numeric nutrient standards for nitrogen and phosphorus the agency approved a decade ago “remain in effect for Clean Water Act purposes” and will remain so “unless or until the EPA approves the removal of the currently applicable numeric nutrient criteria and approves revised water quality standards.”A DEQ spokesperson did not directly answer MTFP’s questions about what water quality standards DEQ is using to assess Montana waterways and determine whether permittees are complying with state and federal regulations.The agency wrote in an email that no permitted pollution sources under its regulatory oversight are discharging into the Big Hole, suggesting that its enforcement role is limited. The agency also wrote that an impairment designation is not required to implement water quality improvement projects such as creating riparian buffers, improving forest roads, or creating shaded areas. “Watershed partners may begin actively working on nonpoint source pollution reduction projects at any time,” DEQ spokesperson Madison McGeffers wrote to MTFP. “There is nothing standing in the way of starting work on these types of projects to improve water quality. In fact, the Big Hole River Watershed Committee is actively implementing its Watershed Restoration Plan with funds and support from DEQ Nonpoint Source & Wetland Section’s 319 program.”Alsentzer countered that a science-based cleanup plan and greater accountability will benefit the Big Hole regardless of whether nutrients are flowing into the river from a pipe or entering via more diffuse and harder-to-regulate channels.“You can’t get to that if you don’t recognize that you’ve got a problem we need to solve,” he said, adding that an impairment designation “unlocks pass-through funding to the tune of millions of dollars.”Addressing manmade threats to the Big Hole should be a priority for DEQ, given local communities’ economic reliance on a healthy river, he added.“It’s just a real tragic state of affairs when you have a blue-ribbon trout fishery in a very rural county that’s essentially having its livelihood flushed down the drain because we can’t get our agencies to actually implement baseline river protections (and) use science-based standards,” Alsentzer said. “When people try to do the work for the agency and help them, they’re getting told to go pound sand. I think that’s wrong.”Two years ago, Montana Fish, Wildlife and Parks biologists recorded historically low numbers of brown trout along some stretches of the Big Hole. Anglers and conservationists floated a number of possible contributing factors, ranging from pathogens and drought conditions to angling pressure and unmitigated pollution. Save Wild Trout, a nonprofit formed in 2023 to understand which factors merit further investigation, described the 2023 southwestern Montana fishery “collapse” as a “canary in the coal mine moment.”In response to the 2023 population slump, Gov. Greg Gianforte announced the launch of a multiyear research effort on Jefferson Basin rivers that FWP is coordinating with Montana State University. Narrative Standards For ‘Undesirable Aquatic Life’ DEQ’s letter to Upper Missouri Waterkeeper and the Big Hole River Foundation leaves open the possibility of a future impairment designation based on narrative water quality standards. After mentioning the 2021 legislation, Nowakowski wrote that the agency reviewed the submitted data “along with other readily available data, in consideration of the state’s established narrative criteria.”The letter goes on to outline the additional material petitioners would need to submit for the agency to evaluate an impairment designation using narrative criteria, which establish that surface waters must be “free from substances” that “create conditions which produce undesirable aquatic life.”In an April 22 letter, Upper Missouri Waterkeeper and the Big Hole River Foundation addressed the petition denial in two parts. First, the groups argued that numeric nutrient standards apply. Second, they resubmitted material — photos, emails, a macroinvertebrate report, and “Aquatic Plant Visual Assessment Forms” — to support an impairment designation under the looser narrative standards. “We encourage DEQ to do the right thing, use all available science to determine the Big Hole River impaired for nutrients, and commit to working with petitioners and other (stakeholders) in addressing the pollution sources undermining this world-class waterway and harming the diverse uses it supports,” the letter says. Alsentzer noted that he has set up a meeting with the EPA to discuss DEQ’s treatment of the petition and its description of applicable water quality standards.The dispute over numeric nutrient standards comes shortly after the Legislature passed another bill seeking to repeal them. Any day now, Gianforte is expected to sign House Bill 664, which bears a striking similarity to 2021’s Senate Bill 358. HB 664 has garnered support from Nowakowski, who described it as a “time travel” bill that will return the state to “individual, site-by-site” regulations in lieu of more broadly applicable numeric standards. This story was originally published by Montana Free Press and distributed through a partnership with The Associated Press.Copyright 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.Photos You Should See - Feb. 2025

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Behind the Scenes: Communities Around ‘Last-Mile Warehouses’ Struggle With Online Shopping Boom’s Pollution

Online shopping has reached epic proportions in the United States—and Manhattan is its beating heart. More than 2.4 million packages are delivered to New York City every weekday, and around 90 percent of goods are transported into or around the city by trucks. While shipping may be free for consumers on many of these orders, […]

A number of facilities have popped up around NYC to help accommodate the online shopping surge. Many environmental justice communities pay the toll of their pollution.By Kiley PriceOnline shopping has reached epic proportions in the United States—and Manhattan is its beating heart. More than 2.4 million packages are delivered to New York City every weekday, and around 90 percent of goods are transported into or around the city by trucks.

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Supreme Court justices consider reviving industry bid to ax California clean car rule

The Supreme Court on Wednesday heard oral arguments in a case that could revive a bid by fuel producers to ax California’s clean car standards. The court was not considering the legality of the standards themselves, which require car companies to sell new vehicles in the state that produce less pollution — including by mandating a significant share of cars sold to be electric or hybrid. Instead, the Supreme Court was considering whether the fuel industry had the authority to bring the lawsuit at all. A lower court determined that the producers, which include numerous biofuel companies and trade groups representing both them and the makers of gasoline, did not have standing to bring the case. Some of the justices were quiet, so it’s difficult to predict what the ultimate outcome of the case will be. However, others appeared critical of the federal government and California’s arguments that the fuel producers do not have the right to bring a suit. Justice Brett Kavanaugh in particular noted that the Environmental Protection Agency (EPA) itself did not initially try to have the case tossed on that basis. “Isn't that a tell here? I mean, EPA, as you, of course, know, routinely raises standing objections when there's even — even a hint of a question about it,” Kavanaugh said. The fuel producers argued that while it was technically the auto industry that was being regulated, the market was being “tilted” against them as well by California’s rule, which was also adopted by other states. The EPA and California have argued that the fuel producers are arguing on the basis of outdated facts and a market that has shifted since the rule was first approved by the EPA in 2013. The EPA needs to grant approval to California to issue such rules. The approval was revoked by the Trump administration and later reinstated in the Biden administration. If the justices revive the currently dismissed case, lower courts would then have to decide whether to uphold the California rule — though the underlying case could eventually make its way to the high court as well. Meanwhile, California has since passed subsequent standards that go even further — banning the sale of gas-powered cars in the state by 2035. That rule was approved by the Biden administration — though Congress may try to repeal it.

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Air, Light Pollution Increase Risk Of Thyroid Cancer In Children

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Environmental Agency Denies Petition to Designate Big Hole River as Impaired by Nutrient Pollution

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Air, Light Pollution Increase Risk Of Thyroid Cancer In Children

Related News

Environmental Agency Denies Petition to Designate Big Hole River as Impaired by Nutrient Pollution

Behind the Scenes: Communities Around ‘Last-Mile Warehouses’ Struggle With Online Shopping Boom’s Pollution

Supreme Court justices consider reviving industry bid to ax California clean car rule

EPA fires or reassigns hundreds of staffers

EPA firing 280 staffers who fought pollution in overburdened neighborhoods

Suggested Viewing

Giants of Big Sur: California Condor Stories Part 1: Return to the Wild

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Uncovering the Permian Climate Bomb

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Join us to forgea sustainable future

sign up for our mailing list to stay informed on the latest films and environmental headlines.

Join us to forge
a sustainable future