Earth Day, first celebrated in 1970, is set for April 22, 2017, and to mark the day, the NASA Jet Propulsion Laboratory posted observations from children about Earth and its importance. Here's what they had to say. NASA Jet Propulsion Laboratory
Earth Day, first celebrated in 1970, is set for April 22, 2017, and to mark the day, the NASA Jet Propulsion Laboratory posted observations from children about Earth and its importance. Here's what they had to say. NASA Jet Propulsion Laboratory

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