Pollution

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

In Barcelona, a bridge for cars that pedestrians will want to hang out on, too

Paris bans diesels (and restricts traffic)

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