Images of our planet from space helped the environmental movement gain popular support around the time of the first Earth Day in 1970.
Images of our planet from space helped the environmental movement gain popular support around the time of the first Earth Day in 1970. Handout NASA Goddard
Images of our planet from space helped the environmental movement gain popular support around the time of the first Earth Day in 1970. Handout NASA Goddard

On Earth Day, a call to arms on climate

April 21, 2015 5:00 PM

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