Though exposure through consumer products is a reasonable concern, there are two even larger facets of the problem, said Shari Franjevic, who leads the GreenScreen For Safer Chemicals program at the nonprofit Clean Production Action. One is how that product came to exist in the first place – people who might work at a plant where PFAS are produced or heavily used are typically among the most most exposed to the hazardous chemicals. The other is where it will end up once it’s discarded, which is a problem for those who live nearby and are exposed through contaminated drinking water.