Question

What industry is the primary user of perchloroethylene, a chemical that researchers at Boston University have linked to mental illness, like bipolar disorder?

Answer 1

Dry cleaners. Hope this help

Answer 2

The dry cleaning industry is the primary user of the chemical perchloroethylene (PCE). The research done by the researchers at the Boston university have found that the PCE chemical increases the risk of developing mental illnesses in the people working with it. Since, it is a common name in the dry-cleaning industry, the workers in this industry are much more prone to mental illnesses a compared to other people.

Hence, the answer is 'dry cleaning industry'.