PENNSYLVANIA, USA — In the days, years, and decades ahead of the first Earth Day, Americans were consuming large amounts of gasoline and fossil fuels. Businesses were able to emit plumes of smoke into ...

Forget the neat, tidy narratives you might have heard in school about a stable, unchanging Earth. Just like history, our ...

Earth Day is one of the most popular and widespread non-religious holidays in the world, recognized in over 100 nations across continents. Although the event was primarily based in the United States, ...

You might know that Saturday, Apr. 22 is Earth Day, but where did it come from and why do we celebrate? Here are some interesting facts about this worldwide celebration that’s been going on for more ...

Add Yahoo as a preferred source to see more of our stories on Google. Get excited about Earth Day with these interesting facts about the world. Traveling to new places always expands the mind, but ...

To mark Earth Day, NBC’s Brian Cheung joins TODAY to break down numbers and facts about the blue planet, including how it got its name and how many miles food may travel to get to your plate. He also ...