
Today in eco-history: First Earth Day teach-in held
The late environmentalist, Sen. Gaylord Nelson, D-Wis., founded Earth Day as an environmental teach-in first held on April 22, 1970.
It's your world

The late environmentalist, Sen. Gaylord Nelson, D-Wis., founded Earth Day as an environmental teach-in first held on April 22, 1970.