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Earth Day


a day's observance of the need to protect the Earth's environment, in many countries on April 22


The first Earth Day was organized in 1970 to promote the ideas of ecology, encourage respect for life on earth, and highlight growing concern over pollution of the soil, air, and water.

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1969's 21st Century Lexicon
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Earth Day

as an annual ecological awareness event on April 22, dates to 1970; the idea and the name formed in 1969.

Online Etymology Dictionary, © 2010 Douglas Harper
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