From its 1970 origins to today's climate action, here's why Earth Day is observed each April 22 and what the day represents.

Earth Day, which began in 1970, is celebrated each year on April 22.

Millions of people around the world will pause Wednesday, at least for a moment, to mark Earth Day. It's an annual event founded by people who hoped to stir activism to clean up and preserve a planet ...

Earth Day often inspires communities to come together through volunteer work, and 2026 won't be much different.

Add Yahoo as a preferred source to see more of our stories on Google. Earth Day is a celebration that comes at a time when climate change is affecting communities across the globe. Earth Day, which ...