Documerica was a program sponsored by the Environmental Protection Agency to photographically document subjects of environmental concern in America during the 1970s. The images were made by approximately 70 well-known photographers contracted by the EPA for this project. Photographers included Danny Lyon, Gene Daniels, Marc St. Gill, Bill Strode, Charles O'Rear, Jack Corn, Tomas Sennett, Yoichi Okamote, and Ken Hayman.