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How wild fig trees can help monitor mercury pollution

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Sunday, April 20, 2025

Wild fig trees may provide an inexpensive, effective way to monitor mercury pollution near artisanal and small-scale gold mining sites throughout the Global South, a recent study suggests.Published in Frontiers in Environmental Science, the analysis looked at whether fig trees might serve as a biomonitoring tool near small-scale gold mines. The mines, largely located in South America, Southeast Asia and sub-Saharan Africa, use liquid mercury to separate ore and gold, unleashing high levels of mercury pollution. The contaminated air generated by burning mercury-gold amalgam to isolate gold can endanger health in humans and animals. But the industry — largely unregulated — lacks reliable monitoring data, the researchers write.

Trees nearest the mines had higher concentrations of mercury in their rings. Passive air sampling confirmed the mercury measurements.

Wild fig trees may provide an inexpensive, effective way to monitor mercury pollution near artisanal and small-scale gold mining sites throughout the Global South, a recent study suggests.

Published in Frontiers in Environmental Science, the analysis looked at whether fig trees might serve as a biomonitoring tool near small-scale gold mines. The mines, largely located in South America, Southeast Asia and sub-Saharan Africa, use liquid mercury to separate ore and gold, unleashing high levels of mercury pollution. The contaminated air generated by burning mercury-gold amalgam to isolate gold can endanger health in humans and animals. But the industry — largely unregulated — lacks reliable monitoring data, the researchers write.

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In “Cancer Alley,” Black Communities Get All the pollution, But Few of the Jobs

This story was originally published by Grist and is reproduced here as part of the Climate Desk collaboration. Residents of the mostly Black communities sandwiched between chemical plants along the lower Mississippi River have long said they get most of the pollution but few of the jobs produced by the region’s vast petrochemical industry.  A new study led by Tulane University […]

This story was originally published by Grist and is reproduced here as part of the Climate Desk collaboration. Residents of the mostly Black communities sandwiched between chemical plants along the lower Mississippi River have long said they get most of the pollution but few of the jobs produced by the region’s vast petrochemical industry. A new study led by Tulane University backs up that view, revealing stark racial disparities across the US’s petrochemical workforce. Inequity was especially pronounced in Louisiana, where people of color were underrepresented in both high- and low-paying jobs at chemical plants and refineries.  “It was really surprising how consistently people of color didn’t get their fair share of jobs in the petrochemical industry,” said Kimberly Terrell, a research scientist with the Tulane Environmental Law Clinic. “No matter how you slice or dice the data by states, metro areas or parishes, the data’s consistent.” Toxic air pollution in Louisiana’s petrochemical corridor, an area often referred to as “Cancer Alley,” has risen in recent years. The burdens of pollution have been borne mostly by the state’s Black and poor communities, according to the US Environmental Protection Agency.  The Tulane study’s findings match what Cancer Alley residents have suspected for decades, said Joy Banner, co-founder of the Descendants Project, a nonprofit that advocates for Black communities in the parishes between New Orleans and Baton Rouge. “You hear it a lot—that Black people are not getting the jobs,” she said. “But to have the numbers so well documented, and to see just how glaring they are—that was surprising.” People of color were underrepresented in all of the highest-paying jobs among the 30 states with a large petrochemical industry presence, but Louisiana and Texas had “the most extreme disparities,” according to the study, which was published in the journal Ecological Economics.  While several states had poor representation on the upper pay scale, people of color were typically overrepresented in the lower earnings tiers.  In Texas, nearly 60 percent of the working-age population is nonwhite, but people of color hold 39 percent of higher-paying positions and 57 percent of lower-paying jobs in the chemical industry.  Louisiana was the only state in which people of color are underrepresented in both pay categories. People who aren’t white make up 41 percent of the working-age population but occupy just 21 percent of higher-paying jobs and about 33 percent of lower-paid jobs.  The study relied on data from the US Census Bureau, the Equal Employment Opportunity Commission, the Bureau of Labor Statistics and Louisiana Economic Development. The chemical industry disputed the study’s findings. “We recognize the importance of examining equity in employment, however, this study offers an incomplete and misleading portrayal of our industry and its contributions,” David Cresson, president and CEO of the Louisiana Chemical Association, said in a statement.  Cresson pointed to several industry-supported workforce development programs, scholarships and science camps aimed at “closing the training gap in Louisiana.” But the study indicates education and training levels aren’t at the root of underrepresentation among states or metro areas. Louisiana’s education gap was modest, with college attainment at 30 percent for white residents and 20 percent for people of color. In places like Lake Charles and St. John the Baptist Parish, where petrochemical jobs are common, the gap was minimal—five percentage points or less. The industry’s investments in education are “just public relations spin,” Banner said.  “The amount of money they’re investing in schools and various programs pales in comparison to how much they’re profiting in our communities,” she said. “We sacrifice so much and get so little in return.” Louisiana is also getting little from generous tax breaks aimed at boosting employment, the study found.  The state’s Industrial Tax Exemption Program has granted 80 percent to 100 percent property tax exemptions to companies that promise to create new jobs. For each job created in Cameron Parish, where large natural gas ports have been built in recent years, companies were exempted from almost $590,000 in local taxes. In St. John, each job equated to about $1 million in uncollected tax revenue. “This tradeoff of pollution in exchange for jobs was never an equal trade,” said Gianna St. Julien, one of the study’s authors. “But this deal is even worse when the overwhelming majority of these companies’ property taxes are not being poured back into these struggling communities.”   This coverage was made possible through a partnership between Grist and Verite News, a nonprofit news organization producing in-depth journalism in underserved communities in the New Orleans area.

Air, Light Pollution Increase Risk Of Thyroid Cancer In Children

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 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.

 A Chicago law could shift where heavy industry operates — and who bears the burden of pollution

As Trump dismantles protections, the ordinance is a test case for environmental justice.

This coverage is made possible through a partnership between Grist and WBEZ, a public radio station serving the Chicago metropolitan region. Chicago city leaders are set to consider a major overhaul in how and where polluting businesses are allowed to open, nearly two years after the city settled a civil rights complaint that alleged a pattern of discrimination threatening the health of low-income communities of color. The measure, expected to be introduced Wednesday, would transform how heavy industry is located and operated in the country’s third largest city. If passed into law, it would require city officials to assess the cumulative pollution burden on communities before approving new industrial projects. As the Trump administration dismantles protections for poor communities facing lopsided levels of pollution, Chicago’s ordinance is a test case for local action under a federal government hostile toward environmental justice. Over the past three months, the Trump administration has already undone long-standing orders to address uneven environmental burdens at the federal level and challenged government programs monitoring environmental justice issues across the country.  Now, advocates are hoping the local legislation becomes a blueprint for how state and local governments can leverage zoning and permitting to protect vulnerable communities from becoming sacrifice zones.  “The Trump administration is trying to erase history,” said Gina Ramirez, the Natural Resources Defense Council’s Midwest director of environmental health. “You can’t erase our industrial past — it’s literally haunting us.” Chicago’s industrial history is especially pronounced in low-income communities on the city’s South and West sides. The proposed ordinance would give these communities a voice in the permitting process via a new environmental justice advisory board, Ramirez said.  “Nobody wants to be sick,” said Cheryl Johnson, an environmental activist on the Far South Side who has been advocating for pollution protections for almost 40 years. Read Next Why a tree-planting nonprofit in Chicago is suing the Trump administration Juanpablo Ramirez-Franco The Chicago ordinance is named after Johnson’s mother, Hazel Johnson, who started fighting in the 1970s for the health of her neighbors at a public housing community surrounded by a “toxic doughnut” of polluters. Cheryl Johnson runs People for Community Recovery, an organization started by her mother, with the same mission to protect human health. “The most important thing — and the only thing that we get — is good health or bad health,” Johnson said. “That’s what my mother fought for.” In 2020, Johnson’s group, along with several other local environmental justice organizations, launched a civil rights complaint over the city’s role in the relocation of a metal-shredding operation from its longtime home on the North Side to a majority Black and Latino neighborhood on the far South Side of the city. An investigation by the U.S. Department of Housing and Urban Development concluded in 2022 that Chicago had long placed polluters in low-income areas, while sparing majority-white affluent neighborhoods.  In a binding agreement with former President Joe Biden’s administration, the city promised to offer a legal fix. Former mayor Lori Lightfoot signed the agreement with HUD hours before she left office in 2023. Her successor, Mayor Brandon Johnson, vowed to follow the agreement and said that September that an ordinance proposal would be offered in short order. But weeks and months turned into years, and community, health, and environmental advocates complained that the mayor was slow-walking his promises. Nearly two years later, the city is finally set to deliver.  Not all community groups are happy with the proposal. Theresa McNamara, an activist with the Southwest Environmental Alliance, said at a recent public meeting she didn’t think the measure would go far enough. She called it a “weak piece of crap” based on her understanding of the main points. Read Next The odds are Illinois won’t hit its 2030 climate goals Juanpablo Ramirez-Franco Experts said the law’s success would depend on the city’s will to execute and enforce it. “There’s a lot of states and even cities that have assessment tools, but the question is, what do you do with those?” said Ana Baptisa, an environmental policy professor at The New School in New York. In New Jersey, Baptista helped pass a similar ordinance — then the first of its kind — through the Newark City Council in 2016. Since then, local and state governments across the country have followed suit. At least eight states have passed this type of legislation, including California, Minnesota, New York, and Delaware.  Still, Baptista said Newark’s bill has failed to rein in polluting industries. “It proved to be what we feared: a sort of formality that oftentimes doesn’t even get completed,” she said.  Even without power to deny or constrain new pollution sources, the advisory board itself marks progress, according to Oscar Sanchez, whose Southeast Environmental Task Force helped file the original civil rights complaint,.  Sanchez added that as the federal government retreats from its commitments to environmental justice, state and local entities are on the front line of buffering communities from greater pollution burdens. “We are pushing the needle of what people can try to achieve in their own communities,” he said. This story was originally published by Grist with the headline  A Chicago law could shift where heavy industry operates — and who bears the burden of pollution on Apr 16, 2025.

Enviro Groups Petition DEQ to Limit Nutrient Pollution on Big Hole River

Two conservation groups are petitioning the Montana Department of Environmental Quality to designate the Big Hole River as impaired for nutrient pollution

Two conservation groups are petitioning the Montana Department of Environmental Quality to designate the Big Hole River, a treasured southwestern Montana fishery, as impaired for nutrient pollution.The groups argue that an impairment designation will lead the state to put the Big Hole on a “pollution diet” to limit the nitrogen and phosphorous that are contributing to the fishery-damaging algal blooms that have become a recurrent issue.Common sources of nutrient pollution can include runoff from fertilizers, insecticides and herbicides as well as poorly maintained septic systems and manure from livestock.Upper Missouri Waterkeeper and the Big Hole River Foundation are basing their petition on five years of data collection that has found consistently high levels of nitrogen and phosphorus at multiple sites on the Big Hole. The groups also incorporated a macroinvertebrat, or bug, study and an overview of the state and federal laws governing the beneficial uses of waterways in their petition.“There’s no disputing that there’s a nutrient pollution problem on the Big Hole River, with neon-green algal blooms fueled by nutrients cropping up each summer,” Upper Missouri Waterkeeper Executive Director Guy Alsentzer wrote in a release Wednesday about the petition. “Thankfully, the State of Montana has the tools to restore rivers impaired by nutrients, like the Big Hole. We now need to hold the State accountable for taking the necessary steps to designate the river as impaired, develop a pollution diet, and work to reduce pollutant sources that are causing degradation.”Overgrown algae can depress dissolved oxygen levels, harming fish and some of the macroinvertebrates they eat. In some areas, an increase in algae is linked to reduced biodiversity and diminished ecological resilience. The petitioners would like the DEQ to acknowledge that portions of the Big Hole are exceeding established water quality thresholds, recognize they “are not fully attaining their aquatic life or recreational uses” and designate the waterway as impaired for nutrient pollution. The petition also notes the historically low flows, high water temperatures, and declining fish populations the Big Hole has seen in recent years. The 32-page petition comes as anglers and researchers attempt to understand the factors contributing to a marked decline of trout populations in a handful of cold-water fisheries in the Jefferson Basin. In 2023, FWP biologists recorded historically low numbers of brown trout along some stretches of the Big Hole. Anglers and conservationists floated a number of possibilities that may be contributing to the decline, 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, has described the 2023 southwestern Montana fishery “collapse” as a “canary in the coal mine moment.”Wade Fellin, a longtime fishing guide who serves as Save Wild Trout’s program director, described the impairment designation petition as part of his group’s larger effort to help the Big Hole recover from chronic and acute threats.“The Big Hole is suffering blow after blow — extremely low flows prompting mid-season fishing closures, and miles-long algal blooms,” Fellin said in the release. “We must do what we can now to make measurable improvements for the river, and that should start with an official impairment determination to clean up the nutrient pollution that is degrading water quality and aquatic habitat.”A spokesperson for DEQ wrote in an email to MTFP on Wednesday that “nutrient conditions and other algae growth factors appear to be at levels conducive for algae growth in the Big Hole River and several of its tributaries.”The agencies noted that it has been monitoring algae levels on the Big Hole since 2020 and that streamflows and temperatures play an important role in both overall fishery health and algae growth.Under existing law, DEQ is required to provide an initial determination on the petition within 60 days, although Montana lawmakers are debating a bill by House Majority Leader Steve Fitzpatrick, R-Great Falls, that would stretch the agency’s response time to 180 days. House Bill 684 passed through the House last month and cleared an initial Senate vote on Wednesday.Researchers are just embarking on the second year of that research, which will continue for at least three years, according to FWP spokesperson Morgan Jacobsen. One component of that research is examining how flows, water temperature, angling and disease may be contributing to adult fish mortality. A second prong will evaluate tributaries’ contribution to the recruitment of juvenile fish into the adult population. Finally, FWP is examining disease threats with the hope of developing a way to proactively support fish health. To facilitate that research, biologists have tagged trout in the Big Hole, Ruby, Beaverhead and Madison Rivers. FWP is asking anglers who catch a tagged trout to fill out a report online to aid researchers.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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