alleryWhen was the first Earth Day held?
A5 June 1972
B14 October 1977
C16 September 1987
D22 April 1970
Answer & Solution
Correct answer: D. 22 April 1970
1. The first Earth Day was a national teach-in about environmental problems.
2. It was held on April 22, 1970.
3. 5 June 1972 relates to Stockholm and October 1977 to Tbilisi.
_Source: Wikipedia, Environmental education, History_
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