Air in the U.S. has gotten cleaner for decades, adding years to people's lives and preventing millions of asthma attacks, but nearly half of Americans still live with unhealthy air pollution, a new ...
A study focused on two common types of outdoor pollutants widely linked to health harms: nitrogen dioxide and particulate ...
A layer of smog lingers above downtown Los Angeles in 2024. Millions of Americans are still breathing in unhealthy air, despite long-term progress toward cleaning up many sources of pollution, ...
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