Vintage EPA photos reveal what New York City looked like before the US regulated pollution

New York City produces twice as much trash as any other mega-city on Earth, according to a recent study. The Environmental Protection Agency has described Brooklyn's Gowanus Canal as "one of the nation's most extensively contaminated water bodies." And air pollution, coming largely from transportation and construction, remains a threat to residents.

But before the EPA formed in 1970, pollution in New York City was even worse.

Soon after the EPA's founding, the agency dispatched 100 photographers to capture America's environmental problems in a photo project called Documerica. It shows what the US, from California to Ohio to New York, looked like from 1971 to 1977. Of the 81,000 images the photographers took, more than 20,000 photos were archived, and at least 15,000 have been digitized by the National Archives.

Many of the photos were taken before the US regulated things like water and air pollution.

The Trump administration has already rolled back a number of environmental regulations and moved toward repealing the Clean Water Rule, which clarified the Clean Water Act to prevent industries from dumping pollutants into waterways and wetlands. On Monday, EPA administrator Scott Pruitt said the Trump administration plans to eliminate the Clean Power Plan, the Obama administration's biggest initiative to fight climate change by curbing emissions.

Many reports suggest that Pruitt aims to kill environmental protections and dismantle much of the regulatory agency. If he succeeds, parts of the US could return to the state they were in before EPA regulations.

Here's a selection of Documerica photos of New York City that were taken between 1973 and 1974.