In the late 1960's a large segment of the American public became alarmed at what was seen as wasteful depletion and polluting use of our natural resources. The hue and cry that was raised carried us into "the environmental decade" a time for positive action to solve the perplexing problems that beset man in an increasingly crowded world.
Wahlgren, H. E.
"Research on Solid Waste Recycling at the Forest Products Laboratory,"
Ames Forester: Vol. 59
, Article 8.
Available at: https://lib.dr.iastate.edu/amesforester/vol59/iss1/8