16 simple ways to reduce plastic waste

Exxon knew climate risks in 1981, email suggests

U.S. Coast Guard saves sea turtles tangled in trash

Boyan Slat's Ocean Cleanup Project to launch in 2016

15 indelible images from the Refugio oil spill

Just in time for summer, NYC street food carts get solar-powered makeover

The Pliocene called. It wants its CO2 levels back.

Four in 10 in U.S. live with dangerous air pollution

Air pollution may shrink the brain

India launches clean air index to help tackle pollution

Roadside billboard in Peru doubles as thriving lettuce farm

Glow-in-the-dark tampons help detect sewage pollution