52nd annual Earth Day is April 22

	This month, the world will celebrate the 52nd annual Earth Day. 
	Earth Day is always celebrated on April 22, and raises awareness of the importance of long-term ecological sustainability.
	Wisconsin Senator Gaylord Nelson came up with the idea of Earth Day in the 1960s, and established the first Earth Day on April 22, 1970.
	Beginning in 1990, Earth Day went worldwide, teaching everyone that a clean Earth is a happy Earth.