Households affected by Tijuana sewage odors can now enter a San Diego County drawing to receive a free air purifier. Launched Friday, the pilot program offers an opportunity to sign up by 3 p.m. Aug.

Raj Fadadu was still in medical school on the day the sky turned orange. "I remember waking up for my class ... I was like, 'Oh, is this just a really intense sunrise? But no, the entire sky was just ...

Extreme heat is making air pollution worse, scientists say. And President Trump’s regulatory rollbacks could drive air pollution even higher. By Claire Brown and Christina Kelso The heat dome that is ...

India's capital Delhi is blanketed in toxic smog every autumn, but the pollution is already so bad that it's drawn protests ...