For those of us who were born after 1970, Earth Day has always been a reality.

But if you weren’t around to see its movement begin, you might wonder how it all got started.

This video highlights some of the most important facts about how Earth Day began, and gives credit to the great people who put it all into place and got the world to “wake up and pay attention to the most important challenge the human species faces.

(No, that quote isn’t attributed to Al Gore – it was Gaylord Nelson!)

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