The following is an excerpt from Out of Sight: The Long and Disturbing Story of Corporations Outsourcing Catastrophe by Erik Loomis (The New Press,  2015):
The new environmental laws of the 1970s proved immediately effective. Between 1972 and 1978, presence of sulfur dioxide in the environment fell 17 percent, carbon monoxide by 35 percent, and lead by 26 percent.15 Americans lauded a future of jobs and health, prosperity and beautiful nature. Unions such as the United Steelworkers of America, who represented many Donora workers, the United Auto Workers, and the Oil, Chemical, and Atomic Workers made alliances with environmentalists and promoted the Clean Air Act, Clean Water Act, and other core legislation that protected all Americans, whether members of the working class or wealthy, from the emissions and pollutants of industry. Environmentalists for Full Employment formed in 1975 to “publicize the fact that it is possible simultaneously to create jobs, conserve energy and natural resources and protect the environment.” When Ronald Reagan became president and cut OSHA and EPA funding, the AFL-CIO and Sierra Club created the OSHA/Environmental Network to organize resistance between the two movements. Environmentalists and a Union of Needletrades, Industrial and Textile Employees local representing tannery workers in Fulton County, New York, overcame past differences and worked together on both the workplace environment of the tannery and tannery-created water pollution. By the late 1990s, workers reporting environmental violations and environmentalists helped the union develop plans to improve working conditions in the plants.
The potential for a strong labor-green coalition to fight for healthy workplaces and ecosystems clean enough for people to enjoy in their free time was a threat to corporations. Companies responded to environmentalism’s rise by taking advantage of a road the American government had already opened to them—moving their operations away from the people with the power to complain about pollution. They did this in two ways. Some industries scoured the nation, seeking the poorest communities to place the most toxic industries. They assumed those communities, usually dominated by people of color, would not or could not complain. The companies would work with corrupt local politicians to push through highly polluting projects before citizens knew what was entering their communities. Other industries went overseas, seeking to repeat their polluting ways in nations that lacked the ability or desire to enforce environmental legislation. Capital mobility moved toxicity from the middle class to the world’s poor.