As the 1960s came to an end, the rapid development of the American postwar decades began to take a noticeable toll on the environment, and the public called for action. In November 1971, the newly created Environmental Protection Agency announced a massive photo documentary project, called DOCUMERICA, to record the adverse effects of modern life on the environment. More than 100 photographers were hired not only to document specific issues, but to capture images showing how we interacted with the environment. By 1974, more than 80,000 photographs had been produced. The National Archives recently made 15,000 of these images available, and I've spent much of the past week combing through those to bring you these 46 glimpses of America in the early 1970s, with an eye toward our then-ailing environment.