Pollution

Creeping light pollution may be affecting plants as well as animals.

Unreported emissions account for 12 percent of all human-made sulfur dioxide.

A new gadget can help people identify pollutants — some smaller than the width of a hair — in their homes.

China's frequently choking haze is providing an unexpected benefit to racing pigeons in one of the country's most polluted regions, helping the birds to navigate home faster.

Northeastern China is covered in hazy pollution clouds, according to satellite images taken by NASA, which have created health hazards for many Chinese citizens.

Shenyang's smog is even a problem for healthy individuals.

Outdoor air pollution kills 3.3 million people around the world every year, according to a new study.

Pollution and dust is shrinking the monsoon season, threatening the crops that feed millions.

Fireworks are a beloved tradition of the Fourth of July, but the colorful displays also bring a spike in air pollution, a new study shows.

People who breathe polluted air every day may have smaller brains, and a higher risk for "silent strokes," researchers say.