The nonprofit ProPublica created a map of the United States that shows where air pollution from industrial plants is concentrated. Many of these chemicals have been associated with cancer.

Using advanced data processing software and a modeling tool developed by the Environmental Protection Agency, they mapped the spread of cancer-causing chemicals from thousands of sources of hazardous air pollution across the country between 2014 and 2018. The result is an unparalleled view of how toxic air blooms around industrial facilities and spreads into nearby neighborhoods.