"May cause" means there is NO scientific evidence!-----EPA designates 2 forever chemicals as hazardous substances, eligible for Superfund cleanup

And earlier this month, chemical manufacturer 3M Co. announced it will begin payments to many U.S. public drinking water systems as part of a multibillion-dollar settlement over contamination with forever chemicals: 

"The term PFAS is short for per- and polyfluoroalkyl substances. 

The chemicals can accumulate and persist in the human body for long periods. 

Evidence from animal and human studies indicates that exposure to PFOA or PFOS may lead to cancer or other health problems, including liver and heart damage and developmental problems in infants and children...