Related articles:
Equinox
Theta
Gaylord Nelson
United Nations
Arbor Day
1970
March 21
1971
Earth Hour
Rachel Carson
Time (magazine)
Wilderness
April 22
Ocean
Paul Newman
Ecology
February 26
Earth
2007
Key terms:
earth day
flag
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equinox
celebrate
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lenin
united nations
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nationwide
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denis hayes
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each year
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million people
peace activist
demonstrations
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colleges and universities
Search external links cited by footnotes on Wikipedia page Earth Day:
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