Photo by Yan Berthemy on Unsplash

As schools spend millions on air purifiers, experts warn of overblown claims and harm to children

A KHN investigation found that more than 2,000 schools have spent millions of dollars for systems, lured by air purifier companies' claims that experts say mislead or obscure the potential for harm from toxic ozone.

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Why the air quality in Philly might be worse than we know

Experts say the problem here goes beyond 2 dangerous pollutants assessed nationally by the American Lung Association, ozone smog and fine particles.

Report: Las Vegas ozone pollution getting better, but still high

Ozone pollution in Las Vegas has improved, but the city still ranks among the most polluted metro areas in the country, according to a newly released report by the American Lung Association.

Allegheny County launches air quality dashboard

Allegheny County has launched a new dashboard to present the public with data about air quality at several of its monitors.

EPA chief dismisses dozens of key science advisers picked under Trump

EPA Administrator Michael Regan will dismiss outside experts appointed by President Trump from two key advisory panels, a move he says will reduce the heavy influence of industry over the agency’s environmental regulations.

Donnel Baird wants to bring green energy to America’s poorest neighborhoods

Solar panels and clean heat shouldn’t be limited to the wealthy, says Donnel Baird, who’s bringing green power to low-income neighborhoods.

Who’s going to take responsibility for air pollution in Texas?

Legal experts say that environmental laws must be more strongly enforced by the government to protect the health and safety of Texans.

New Jersey environmental justice movement's huge win against 'a slow murder'

Officials are giving residents of some long-suffering New Jersey communities tools to push back against polluters.


Pandemic shutdown led to better ozone days in the spring in Columbus area

Central Ohio had lower spring pollution levels thanks to the early pandemic shutdown in 2020, but during the summer, the region saw two high ozone pollution days, according to the Mid-Ohio Regional Planning Commission's latest air quality report.


Supermarkets struggle to stop HFC leaks in freezers fueling global warming

Empowered by new legislation and the White House, the United States is setting up a program to curb climate-warming refrigerants. A new undercover survey suggests that leaks of these refrigerants are more common than assumed.

China’s emissions of ozone-harming gas are declining, studies find

New research confirms that emissions from China of CFC-11, a banned gas that harms Earth’s ozone layer, have fallen sharply, reversing a dangerous spike.

What you need to know about air quality improvements in Allegheny County

We have the details about which air quality standards Allegheny County now meets, how these gains were made, and if they will last.

Allegheny County's air monitors showed compliance with federal standards. But what does that mean?

Environmental advocacy groups say this is a foot in the right direction but a lot more work is needed before the county can claim a victory.

15 states sue EPA over decision not to tighten pollution standard for smog

Fifteen states and two cities have sued the Environmental Protection Agency for declining to tighten air quality standards for ozone pollution, the main ingredient in smog.

EPA: Wheeler unveils final rule to limit agency's use of science

The Trump administration, during its last days in power, fired another shot in its war on regulations and science-based policies, rewriting the rules on the use of scientific research at EPA.
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Climate change, chaos, and cannibalism

Forty eight years ago, a sci-fi thriller predicted a future with all three—in the year 2022.

U.S. Steel abandons clean tech plans in Pittsburgh region following damning health study

The company scraps planned Pennsylvania investments and will instead shut down three polluting batteries in 2023. The announcement comes a week after a study shows lower lung function in people living near its Pittsburgh-region facility.

LISTEN: The allure of regenerative agriculture

"Every being is the full expression of themselves."

Fertility & Environmental Justice: A conversation with Shanna Swan and Annie Hoang

"These toxics chemicals are affecting you—not just the polar bears, the insects, and the birds."

Fractured: The body burden of living near fracking scientific investigation finds western Pennsylvania families near fracking are exposed to harmful chemicals, and regulations fail to protect communities' mental, physical, and social health.

Can marine protected areas reduce marine disease?

EHN talked to marine disease experts about the role of increasing ocean protection in combating rising disease rates.

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