Millions of people around the world will pause, at least for a moment, to mark Earth Day. The annual event is Wednesday.

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 began as a protest in 1970, but its meaning has evolved. Here’s how it changed - and what it represents today.

For all that scientists rightfully worry about the dangers of climate change, the environmental movement has come a long way ...

Ahead of Earth Day on Wednesday, April 22, we're sharing some of Trump's sweeping policies that may have major consequences ...

Now protest may have put Greenpeace USA on the brink of extinction.

The first Earth Day enjoyed strong participation nationwide and, importantly, motivated officials to take concrete steps to ...

Our Power, Our Planet” — that’s the theme for this year’s ‘Earth Day’.  The annual day recognizing the importance of ...

Earth Day was founded in 1970 following a 1969 Santa Barbara oil spill. But its meaning has changed today. Here's why you ...

For more than half a century, the United States has been celebrating Earth Day. According to the Environmental Protection Agency, it was in the spring of 1970, Sen. Gaylord Nelson created Earth Day as ...

La Rabida Children's Hospital went all out for Earth Day on Wednesday, with volunteer cleanup efforts by staffers and ...

When part of a SpaceX rocket re-entered Earth's atmosphere exactly a year ago, it created a spectacuglar fireball that streaked across Europe's skies, delighting stargazers and sending a team of ...