Air pollution levels keep getting worse for more people in the US, according to a new report, and experts say the Trump ...

The new report says that 85 million people in the US live in an area with a failing grade for year-round particle pollution, the second-highest number of people with such exposure since the report ...

The new report says that 85 million people in the US live in an area with a failing grade for year-round particle pollution, the second-highest number of people with such exposure since the report ...

Cities in California make up a significant proportion of the country's most polluted metropolitan areas when it comes to air quality, according to a new report.