We have curated lectures about the environment to recognize the anniversary of the Earth Day and give testament to what the environmental movement has meant in America. Earth Day is celebrated in the US on April 22 and is a day designed to inspire awareness and appreciation for the Earth’s environment. It was founded by US Senator Gaylord Nelson (D-Wisconsin) as an environmental teach-in in 1970, and is celebrated in many countries every year. This date is Spring in the Northern Hemisphere and Autumn in the Southern Hemisphere. The United Nations celebrates an Earth Day each year on the March equinox, which is often March 20, a tradition which was founded by peace activist John McConnell in 1969. Be sure to check out more excellent content from the show American Experience: Earth Days that premiered on the 40th Anniversary of Earth Day in 2010.