todaysdocument:

The Twin Towers of the World Trade Center officially opened 40 years ago on April 4, 1973.  At the time of their completion they were the tallest buildings in the world.

These photos, taken shortly after the World Trade Center was completed in the early 1970s, are part of the DOCUMERICA series, a program sponsored by the Environmental Protection Agency to photographically document subjects of environmental concern in America during the 1970s.

Find more images from DOCUMERICA at “Searching for the Seventies: The DOCUMERICA Photography Project,” now open at the National Archives in Washington, DC.