Earth Day is turning 40 this year, and we probably need it more than we ever have.

A quick look at the article on Yahoo!

On April 22, the 40th anniversary of Earth Day will be celebrated from coast-to-coast; a day which was first realized by Wisconsin Senator Gaylord Nelson who wanted to find a way to increase environmental awareness and to promote urgently needed federal legislation to deal with an alarming ecological crisis.

And the link to the remainder of the article. History of Earth Day and how you can get involved.