Two Tone Green Square

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Green and blue triangles on a yellow background

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The Idaho State University's Eco-Alliance Committee sold these buttons to support the first "Environmental Teach-In" on April 22, 1970, now known as Earth Day. Yellow is for sunshine. Green is for plants, grass and trees. Blue is for clear skies and water. This teach-in was a major moment in changing American's consciousness of ecology and the deterioration of the environment.

Sources

Idaho State Journal Newspaper Archives, Mar 19, 1970, p. 2. (1970, March 19). NewspaperArchive. https://newspaperarchive.com/idaho-state-journal-mar-19-1970-p-2/ 

Catalog ID AR0404