Green and blue triangles on a yellow background
|Year / Decade Made|
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. https://newspaperarchive.com/idaho-state-journal-mar-19-1970-p-2/