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Denis Allen Hayes (born August 29, ) is an environmental advocate and an advocate for solar power.
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Denis Allen Hayes ( –) American environmental activist and Earth Day organizer As executive director of the first Earth Day in April , Hayes helped launch the modern .
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Time Magazine named environmental activist, Denis Hayes, as one of the " Heroes of the Planet" in He has spent most of his life working for a better world and first gained .
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Denis Hayes (born ), environmental advocate and proponent of solar power; Denis A. Hayes (–), American labor union leader; Dennis K. Hays (born ), United States Ambassador to Suriname.