Pollution in New Delhi peaked this month, reaching levels not seen in three years. In some parts of the city, the Air Quality Index approached 1,000—more than three times what is considered hazardous.
Air quality levels are expected to reach unhealthy levels throughout the San Francisco Bay Area, and residents have been warned to avoid exposure.
Scientists looked at psychiatric children's hospital admissions in an Ohio city to investigate the link.
Exposure to air pollution has previously been linked to low birth weight and pre-term birth.
Scientists looked at data on millions of people to learn more about air pollution and mental health.
The researchers' conclusions are based on an 18-year study which involved over 7,000 subjects across six metropolitan areas in the United States.
Some 600,000 children were killed by air pollution in 2016.
Wildfires in British Columbia and California have blanketed the northwest U.S. in smoke, creating some of the most unhealthy air quality in the country.
New Delhi has the worst air quality in the world.
Researchers studied almost 131,000 people in London.
Air pollution causes 200,000 early deaths a year in the U.S. alone.
Researchers believe the Roman Empire was economically stronger—and dirtier—than the much-lauded republic that inspired the founders of the U.S.
Air pollution may play a key role in addressing this issue.
Money from the EU for new coal plants contradicts its plans to reduce air pollution.
Air in China on Wednesday was nearly too dangerous to breath.
Between 25 and 41 percent of nitrogen oxide is emanating from agricultural lands in California.
Killer smog in China has paralyzed some of its top cities in the past—so much so that its defense now includes the world's biggest air purifier.
Two new studies add to the evidence that air pollution is affecting us.
The U.S. benefits from other countries working to curb greenhouse gases and improve air quality.
Pruitt wanted to "promote fresh perspectives."
Robert Phalen, a researcher joining the EPA's board of science advisers, thinks clean air is bad for your health.