Wildfire Smoke Is Even More Dangerous Than Anyone Knew

This is basically the story appeared High country news and part of it Climate Desk cooperation

The more researchers learn about wildfire smoke, the more alarming the picture becomes. Contains microscopic particles known as smoke PM 2.5 Because PM (particulate matter) measures 2.5 microns or less – small enough to easily enter our lungs and then into our bloodstream. Researchers have already linked particles in wildfire smoke to an elevation the risk Stroke, heart disease, respiratory disease, lung cancer and other serious conditions.

And the harmful effects don’t stop there. 2024 was a banner year for research into wildfire smoke and its effects on health, from brain function to fertility. Although much remains to be learned, wildfire smoke is thought to be particularly insidious comparison from other sources of air pollution; Its small particle size, intermittent spikes and high concentration of inflammatory compounds make it even more so dangerous.

This year’s new results are disturbing. But the more we learn about smoke, the more we can protect ourselves from it, whether we live hundreds of miles from a fire or face it head-on like wildland firefighters. Research emphasizes the need for some changes, including in our homes, hospitals, schoolAnd Nursing homesAnd Clean air center For people who have nowhere else to breathe healthy air. Meanwhile, respiratory system Wildland firefighters are currently being vetted by the federal government. Reduce smoke pollution at source by taking measures to reduce the risk and intensity of wildfires such as prescribed burning.

Here are some of the major advances in scientists’ understanding of wildfire smoke in 2024:

New estimates predict 125 million Americans will be exposed to unhealthy air from wildfires by 2054

There is smoke from the fire deleted Air quality has improved in recent years, a trend that is expected to continue. Millions more people will be exposed to unhealthy air in the coming years, according to model Published by the First Street Foundation in February. It is estimated that by 2054, more than 125 million Americans will be exposed to “red” air quality each year, which would be considered a unhealthy Level by Environmental Protection Agency – 50 percent increase from 2024. California’s Central Valley will see the worst of it, with Fresno and Tulare counties likely to experience unhealthy air three months a year, according to the study.

Smoke can disrupt fertility treatments

Some of the wildfires that started over Labor Day weekend in 2020 have engulfed Oregon Worst air quality in the world at that time. Those 10 or so days of hazy air affected everyone, especially patients undergoing in vitro fertilization treatment or IVF. Researchers at Oregon Health and Science University studied 69 patients who received ovarian stimulation and IVF treatment within six weeks of the wildfires. Their research, published in the journal Fertility and infertility In May, found Patients exposed to wildfire smoke produced fewer blastocysts — clusters of cells that can develop into embryos — than those not exposed. Most of the patients still became pregnant, but the study’s lead author said he was concerned about how the smoke might affect fertility treatments. He said Idaho Capital Sun That, as an additional precaution, fertility providers may want to delay IVF or embryo transfer for high-risk patients during periods of low air quality.

Eva Sunderlin of Scottsdale, Arizona, and her granddaughter Aurora Sunderlin observe Bridal Falls in Yosemite National Park in Yosemite, California, as smoke from the Washburn Fire blankets the valley on July 11, 2022.

Photo: Getty Images

Wildfire smoke is killing people prematurely

A study by the University of California, Los Angeles found that thousands more died from wildfire smoke than previously thought. new Research A study published in June in the journal Science Advances found that smog fine particles caused 52,500 to 55,700 premature deaths in California from 2008 to 2018. According to its authors, this is the first long-term study to assess mortality caused by cumulative exposure to wildfire smoke in a state that, like other western states, is seeing more frequent and more severe wildfires.

Smoke exposure is bad for adolescent mental health

Researchers University of Colorado Boulder Wildfire smoke has been shown to increase the risk of mental health challenges in adolescents. D StudyPublished in the journal Environmental Health Perspectives in September, the university analyzed data from 10,000 preschoolers who participated in a long-term study of brain development and child health in the United States. Every additional day in 2016 that children were exposed to “unsafe” air quality readings increased their likelihood of experiencing symptoms of depression and anxiety — even a year later.

Years of firefighting can lead to neurodegenerative diseases

Lab rats are definitely not humans. But in a controlled setting, they can provide useful insights into human health consequences. Researchers exposed mice to the same amount of smoke a wildland firefighter would breathe over a 15- to 30-year career found They were more likely to develop brain disease than mice that were not exposed. The animals’ gene profiles fit a pattern that suggests long-term damage like the effects of Alzheimer’s, Parkinson’s, Huntington’s and other neurodegenerative diseases. Although researchers can’t prove that smoking is a direct cause of higher disease risk, lead author Adam Schuler said Boise State Public Radio Wildland firefighters need to be aware of the effects that a long career in firefighting can have on the human brain.

Wildfire smoke linked to dementia

Breathing in air pollution particles has already been linked to an increased risk of dementia. Now, researchers say, wildfire smoke may pose a greater risk than other pollution sources. Analysis of over 1.2 million people in Southern California found Longer exposure to wildfire smoke — three years, in this study — was associated with a higher risk of a dementia diagnosis. According to the study, published in the journal JAMA Neurology, the odds of a dementia diagnosis increased by 18 percent for every microgram of wildfire pollution over three years, a relatively small amount. for comparisonA census tract near the 2018 campfire in California had an average PM 2.5 exposure of 1.2 micrograms per cubic meter between 2006 and 2020, spiking to an exposure of 310 micrograms per cubic meter during the actual fire.