Remove 2010 Remove Air Pollution Remove Ground-Level Ozone
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Nearly Half of US Breathes Unhealthy Levels of Pollution—Cars and Trucks Largely to Blame

Union of Concerned Scientists

Over 156 million people in the US are exposed to unhealthy levels of air pollutants, according to the recently published 2025 State-of-the Air report from the American Lung Association (ALA). For 25 years the report has helped people across the country understand the quality of the air in their communities.

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Indirect Source Rules: An Emerging Route Toward Clean Freight

Union of Concerned Scientists

Sam Wilson/UCS Todays mega-warehouses facilitate and attract increased freight pollution To facilitate this boom, more and more sprawling warehouses have popped up around the nation. The increase in loading docks is of particular importance when looking at the air and climate pollution impacts from warehouses.