Founded by former U.S. Senator Gaylord Nelson of Wisconsin, April 22 is celebrated as Earth Day by more than 500 million people and governments in 175 countries to inspire awareness and appreciation for earth's environment.
On April 22, 1970, thousands of U.S. colleges and universities organized protests against the deterioration of our natural resources. Approximately 20 million Americans participated with the goal of protecting and preserving our natural resources worldwide. Groups that had been fighting against environmental efforts suddenly realized they shared common values, marking the beginning of the mordern environmental movement.