On Sunday, April 22, more than a billion people around the world will celebrate Earth Day by participating in neighborhood clean-up efforts. The grassroots movement began in 1970 when twenty million A
Stand up for public lands, fight climate change and get outside this April 22 — and all year long.
As Earth Day turns 48, we take a look back at the biggest milestones in environmental protection.
Photographer Justin Hofman's image of a seahorse swimming with a discarded cotton swab illustrates the issues of pollution in our oceans.