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Climate change is taking a visible and increasingly toxic toll on the air Americans breathe. According to a report ...
The LA area is once again the worst for ozone in the U.S., a pollutant impacting millions more people nationwide, the ...
Here's an overview of the top 10 most polluted countries, ranked by their annual average PM2.5 concentration (measured in micrograms per cubic meter). Countries like Nepal, Uganda, and Rwanda also ...