Pollution

Amsterdam birdhouses distribute free Wi-Fi when air pollution levels are down

11 ways to get clean air without chemicals

Going green when it's your time to go

Octopus finds ocean floor home in flip-flop

Insect threatens to turn the Taj Mahal green

Champs-Elysees is going car-free the first Sunday of each month

As U.N. makes history on Earth Day, Leonardo DiCaprio reminds us not to rest on laurels

Gibraltar deflates celebratory annual balloon release

Dead sperm whales discovered with plastic parts, nets in stomachs

Florida's mass fish kill is a nightmare to behold

How do you rescue a tangled porcupinefish? Very carefully.

25% of all deaths linked to pollution and environmental degradation

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