The Ecology symbol was created by Ron Cobb in 1969. The symbol is created by taking the letters "e" and "o", from the words "environment" and "organism". Look magazine incorporated the symbol into an image of a flag in their April 21, 1970 issue. The flag was patterned after the United States flag with thirteen stripes alternating green and white with the green standing for unspoiled land and the white for clean air.
Ecology Flag