[Answer] Earth Day was first celebrated in what year?

 1 : Introduction to the question “Earth Day was first celebrated in what year?
…Earth Day was first celebrated on April 22, 1970, and has since become one of the world’s most popular holidays. The celebration was the brainchild of U.S. Senator Gaylord Nelson of Wisconsin, a staunch environmentalist who wanted to increase ecological awareness. Earth Day is observed on different days around the world, though most nations (including the U.S.) celebrate it on April 22.
Earth Day was first celebrated in what year?

1970:

Earth Day was first celebrated in what year?

The Correct Answer is

1970:

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