What is earth day?

(from wikipedia) "Earth Day, celebrated April 22, is a day designed to inspire awareness and appreciation for the Earth's environment. It is held annually during both spring in the northern hemisphere and autumn in the southern hemisphere. It was founded by U.S. Senator Gaylord Nelson as an environmental teach-in in 1970 and is celebrated in many countries every year."

And in connection of earth day, The Walt Disneys' Earth Movie will be opened tomorrow in celebration of earth day. This film is about the story of migratory journeys of four animal families as well as the earth's journey around the sun and the massive influence it has on all life on the planet, from the Arctic spring to the Antarctic winter. See trailer below.