In 1971, the Environmental Protection Agency created the DOCUMERICA Project, a program designed to document and catalogue the effects of the EPA in its efforts towards environmental conservation. After six years, the program was shut down, but the end result was a massive archive of images gathered by over 100 freelance photographers from all across America. A large part of these photographs are now housed on the US National Archives' online catalogue (as well as its Flickr page). These are my favorites.
With Pineapple Fields as His Arena, Henri Aki Takes His Horse for a Late Afternoon Training Session near Lanai City. Pineapple Growing Takes Up 16,000 Acres of the Island’s Territory, 1973
Photographer: Charles O’Rear