San Francisco is on the verge of passing a ban on "forever chemicals" in the protective clothing firefighters wear while battling blazes. City lawmakers are expected to pass an ordinance on Tuesday that will prohibit the use of firefighting gear made with per- and polyfluoroalkyl substances (PFAS). PFAS have been linked to health harms, including decreased fertility, low-birth weight and developmental delays in children, a greater risk of certain cancers ...