A smoggy view from the George Washington Bridge in 1973. Chester Higgins / US National Archives
By Bob Sussman
The system took shape in the 1960s and 70s as the public and politicians sounded the alarm about the environmental legacy of decades of uncontrolled industrialization. Faced with the threat of unsafe and polluted air, contaminated rivers and streams, hazardous chemicals in homes and products and toxic waste sites, Congress enacted an ambitious set of laws calling for far-reaching protections of public health and the environment. Support for these laws came from across the political spectrum and from presidents as diverse as Richard Nixon, Jimmy Carter, George H.W. Bush and Bill Clinton.