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.


Idaho State Journal Newspaper Archives, Mar 19, 1970, p. 2. (1970, March 19). NewspaperArchive. 

Catalog ID AR0404