History.com

Earth from space

The first Earth Day is celebrated

Earth Day was the brainchild of U.S. Senator Gaylord Nelson of Wisconsin, a staunch environmentalist who hoped to provide unity to the grassroots environmental movement and increase ecological awareness.

Slave trade illustration

U.S. Congress abolishes the African slave trade

The U.S. Congress passed an act to “prohibit the importation of slaves into any port or place within the jurisdiction of the United States…from any foreign kingdom, place, or country.”