It's Earth Day’s 50th birthday! The first Earth Day held April 22, 1970 was marked by peaceful demonstrations by some 20 million Americans in support of environmental protection and reform. It sparked the political change needed to create the EPA and the passage of landmark legislation including the Clean Air, Clean Water, and the Endangered Species Act.In the five decades since it was first celebrated in parks, on streets and college campuses across the U.S., Earth Day has [...]