Cars have been banned from more than 100 streets. Tens of thousands of parking spots have been eliminated. Hundreds of miles ...

Fires and agricultural soils can rival cars and factories in emitting chemicals that lead to ozone, making it hard to meet air quality standards.

Chewing gum releases hundreds of tiny plastic pieces straight into people's mouths, researchers said on Tuesday, also warning of the pollution created by the rubber-based sweet. Research has ...

The study, led by Bjørn Samset of Norway's CICERO Center for International Climate Research, found that China's anti-pollution efforts ... AFP via Getty Images Sulfur dioxide is a key aerosol ...