Tag

Pm25

All articles tagged with #pm25

health2 hours ago•3 min saved

Canadian Wildfire Smoke Pushes U.S. Air Quality Into Unhealthy Range

Widespread Canadian wildfire smoke blankets the Midwest and parts of the Northeast, driving the Air Quality Index into the unhealthy range (scores over 100, with some areas in the 300s), triggering advisories and emergency measures for more than 100 million people. Officials urge staying indoors, using air purifiers or recirculated air, and wearing high-quality masks (N95/KN95) outdoors, especially for vulnerable groups such as children, pregnant people, older adults, and those with asthma or heart disease.

via NBC News|

#air-quality-index #health #masks

environment10 days ago•3 min saved

DC Independence Day Fireworks Trigger World-Record Air-Quality Spike

Washington, DC briefly logged the world’s worst air quality for a major city after an 850,000-shell Independence Day fireworks show, with PM2.5 levels spiking to about 6.7 times pre-fireworks and all city sensors reporting air unhealthy for sensitive groups. The peak occurred around 4am, but thunderstorms helped limit the worst impact. The event, organized byFreedom 250, comes amid broader pollution-control rollbacks championed by the Trump administration.

via The Guardian|

#air-quality #environment #fireworks

environment11 days ago•1 min saved

DC air stayed in the 'unhealthy' range for hours after Independence Day fireworks

Air quality in Washington, D.C. stayed unhealthy for more than 10 hours after a 40-minute Independence Day fireworks show over the National Mall, with PM2.5 peaking at 212.8 µg/m³ in the Navy Yard at 3 a.m. The pollution lingered near the ground and persisted into late morning and early afternoon, according to AirNow data from the EPA.

via The Washington Post|

#air-quality #airnow #environment

health12 days ago•3 min saved

Infant air pollution exposure tied to later obesity via impaired impulse control

A study of 434 children in Mexico City links higher PM2.5 exposure during the first year of life to poorer impulse control in childhood, which is associated with higher BMI and body fat by ages 4–8; researchers say environmental pollution may contribute to obesity and advocate policy action, while noting limitations like small sample size.

via The Guardian|

#air-pollution #childhood-development #health

weather15 days ago•188 min saved

Heatwave and record fireworks could push July Fourth air quality to unhealthy levels

Record heat and oversized Fourth of July fireworks are expected to worsen air quality in many cities: heat domes trap pollutants and boost ground-level ozone, while larger displays emit PM2.5 that can linger for hours; studies show roughly a 42% rise in these particles after shows, risking health for people with asthma, pregnancies, or the elderly, though upcoming storms could provide some relief and reduce ozone formation in some areas.

via CNN|

#air-quality #fireworks #heat

environment19 days ago•22 min saved

Gary residents push for cleaner steel as health concerns mount near Gary Works

Residents living near U.S. Steel Gary Works blame blast-furnace emissions for asthma and cancer risks and are pressing for cleaner direct-reduction steelmaking to cut PM2.5 and ozone; an Indiana University study highlights the Gary mills as major emitters, fueling lawsuits against the EPA and a push for cleaner technology even as Nippon-backed investments promise upgrades elsewhere, leaving Gary’s future—economic viability vs. health protections—center stage in a regional debate.

via Chicago Tribune|

#air-pollution #environment #environmental-justice

environment2 months ago•8 min saved

LA Smog Dominates U.S. Air Quality as California Faces Widespread Unhealthy Air

The 2026 State of the Air report shows Los Angeles-Long Beach as the nation’s worst metro for ozone, with 82% of Californians living in counties with unhealthy air and 44% of Americans in areas failing at least one pollution standard. The findings emphasize transportation and industry as primary sources and warn that federal rollbacks could weaken California’s clean-air authority, potentially causing more than 14,000 deaths and $145 billion in health costs through 2050. While some California areas posted improvements—Sacramento’s lower particle pollution and several cities with zero high-ozone or zero unhealthy PM2.5 days—advocates urge continued funding for zero-emission trucks and other controls to protect public health, especially children.

via Los Angeles Times|

#air-pollution #california #environment

science4 months ago•4 min saved

Iran’s black rain after strikes: a toxic mix of pollutants explained

Following U.S.–Israeli strikes on oil depots in Iran, reports of black, ‘acid’ rain reflect a rainout of heavily polluted air. An atmospheric scientist explains the rain likely contains hydrocarbons, PM2.5, PAHs, heavy metals, and other chemicals, with sulfur dioxide and nitrogen dioxide forming acids in droplets. Short-term health risks include headaches and breathing difficulties, especially for those with asthma, while long-term exposure could raise cancer risk; deposition on surfaces and waterways can spread pollutants. Protective actions include staying indoors, wearing masks, and cleaning surfaces where possible. The piece also notes that all smoke is toxic and that war-related air pollution can have lasting environmental and health impacts.

via PBS|

#acid-rain #air-pollution #airstrikes

health4 months ago•267 min saved

Air Pollution Linked to Higher Alzheimer's and Dementia Risk, Large Study Finds

A large study of nearly 28 million Medicare beneficiaries (2000–2018) finds that higher long-term exposure to air pollution is associated with greater risk of Alzheimer’s disease and dementia, with stronger effects in people who had a stroke. While pollution is not the sole cause of Alzheimer’s, the findings support air-quality interventions and suggest indoor air improvements, such as HEPA-filter purifiers, alongside lifestyle measures like regular exercise, cognitive engagement, and social activity to help reduce risk.

via AOL.com|

#air-pollution #alzheimers-disease #dementia-risk

health-and-medicine4 months ago•43 min saved

Massive US Study Links Air Pollution to Alzheimer’s Risk in Seniors

A nationwide analysis of 27.8 million Americans aged 65+ shows long-term PM2.5 exposure is associated with higher Alzheimer's risk, mainly through direct brain effects rather than via hypertension, stroke or depression; greater risk among those with prior stroke and in disadvantaged communities with higher pollution exposure underscores environmental justice concerns and a push for stricter air-quality standards. The study relies on ZIP-code level outdoor exposure estimates and notes that indoor/work exposure was not included, indicating a need for mechanistic follow-up research.

via Ground News|

#air-pollution #alzheimers-disease #epidemiology

science5 months ago•5 min saved

Air Pollution May Directly Accelerate Alzheimer's Risk, Study Finds

A large observational study from Emory University analyzing about 27.8 million US seniors over 18 years links higher 5-year average PM2.5 exposure to increased Alzheimer's disease risk, suggesting direct brain effects beyond traditional risk factors. Using ZIP-code pollution estimates, the researchers found a strong association even after adjusting for comorbidities, with stroke appearing to heighten vulnerability. While causality can’t be proven, the findings support the public health case for reducing air pollution to help lower dementia risk.

via ScienceAlert|

#air-pollution #alzheimers-disease #neurodegeneration

health5 months ago•5 min saved

Late-pregnancy wildfire smoke linked to autism risk in Southern California births

An analysis of more than 200,000 Southern California births (2006-2014) finds that wildfire smoke exposure in the third trimester is linked to higher autism risk in children, especially during longer stretches of smoky days. Increases are about 10% for 1–5 smoky days, 12% for 6–10 days, and 23% for more than 10 days, with stronger signals for families that did not move. The study uses outdoor PM2.5 estimates and notes limitations, including indoor exposure and behavior not accounted for; results support a link between prenatal air pollution and neurodevelopment, but replication is needed.

via NBC News|

#autism #california #health

climate6 months ago•37 min saved

EPA drops monetization of health benefits in air-pollution rules, tilting policy toward polluters

Vox reports the EPA will stop assigning a dollar value to health benefits (like avoided deaths and hospital visits) in cost-benefit analyses for PM2.5 and ozone rules, evaluating costs without monetized health gains, a shift that experts warn could weaken protections and tilt decisions toward polluters.

via vox.com|

#air-quality #climate #cost-benefit-analysis

environment6 months ago•26 min saved

Xi’an’s air carries more microplastics than before, study finds

A Xi’an, China study found microplastics in city air within PM2.5 tripled over the study period, with post‑pandemic samples dominated by white/transparent fibers from discarded masks. Inhaled microplastics can deposit in the nose, throat, and lungs, and younger people may be more susceptible. Sources include masks, synthetic clothing, tires, and packaging; aging plastics and ozone may boost release. Outdoors indoors exchange and air monitors, along with cleaner streets and better waste management, could help reduce exposure, and some cities promote reusable masks. The study was published in the Journal of Geophysical Research.

via Earth.com|

#air-pollution #environment #masks

science7 months ago•24 min saved

Air Pollution Significantly Undermines Exercise Benefits in Mumbai

High air pollution can significantly reduce the health benefits of outdoor exercise, with pollution levels above 35μg/m^3 PM2.5 making exercise benefits non-significant and potentially harmful above 50μg/m^3. Despite this, exercise remains beneficial in most environments, but awareness and air quality improvements are crucial for maximizing health benefits and reducing risks.

via Hacker News|

#air-pollution #exercise-benefits #outdoor-activity