Happy Anniversary! Earth Day Celebrates Its 40th
April 22 marks the 40th anniversary of the largest organized civic action in U.S. history: Earth Day. In 1970, 20 million Americans participated, helping pave the way for watershed legislation such as the Clean Air Act as well as the creation of the Environmental Protection Agency. Since Earth Day went global in 1990, more than a billion people have signed on. Here are a few ways you and your family can celebrate this year:
*This post was updated at 1:10pm, 4/19/10.