The EPA approved more than 40 drilling and fracking chemicals with known health risks between 2003 and 2014, and only requested chemical safety tests for less than 10 percent of them. "What risks? Agency documents list poisoning of the brain, lungs and liver; tumors; poor development in infants and fetuses," Scott Tong reports for Marketplace.
|Marketplace map that shows some fracking sites that used chemicals associated with health problems; click on image to enlarge or click here to view the interactive map.|
It's difficult to prove cause and effect for chemical exposure, since health problems may not occur until years later, but several studies show that people who live near fracking wells are more prone to have cancer, asthma, high-risk pregnancies and heart defects.