Add Yahoo as a preferred source to see more of our stories on Google. Happy Earth Day! For the 55th year, the world is using the day to celebrate Mother Nature and the wonderful planet we live on.

Earth Day has been celebrated across the country — and the globe — for more than 50 years now, and the annual celebration is once again around the corner. While it may seem strange to think of a world ...

Happy Earth Day! For the 55th year, the world is using the day to celebrate Mother Nature and the wonderful planet we live on. "Earth Day really is a symbol of the environmental movement," Sarah ...