A mere 100 facilities, out of 20,000, produced one third of U.S. industry’s toxic air pollution in 2014. Another 100 released one third of industry’s greenhouse gas emissions, among 7,000 installations that discharge the gas. And according to an investigation by the Center for Public Integrity that created the rankings, 22 “super-polluter” sites appeared on both lists (noted below). Many are coal-fired power plants, and some rank high because they are very large.
— source scientificamerican.com