Almost half of everyone who lives in the United States breathes unhealthy levels of air pollution, according to the American ...

You might be breathing polluted air right now — nearly half of Americans are - Climate-driven wildfires and other emissions ...

The Portland metro area lands in the middle of the pack for ozone pollution, according to a new report from the American Lung ...

For comparison, $28 trillion is a shade less than the sum of all goods and services produced in the United States last year.