How much do you know about Earth Day? Take our quiz!

AP Photo/California State Parks Foundation, Darryl Bush, HO
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April 22 marks the 42nd anniversary of Earth Day, a day intended to inspire awareness and promote appreciation for the Earth's natural environment. In honor of the holiday, test your knowledge of Earth Day history, trivia, and statistics. 

By , Contributor

1. When was the first Earth Day celebrated?

Earth Day was first celebrated in San Francisco on March 21, 1970, the first day of spring in the northern hemisphere.

Earth Day was first celebrated in San Francisco on March 21, 1970, the first day of spring in the northern hemisphere.

Earth Day was first celebrated in San Francisco on March 21, 1970, the first day of spring in the northern hemisphere.

Earth Day was first celebrated in San Francisco on March 21, 1970, the first day of spring in the northern hemisphere.

March 21, 1970

 

April 22, 1970

 

May 21, 1970

 

June 22, 1970

 
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