Discarded masks and personal protective equipment (PPE) have begun to wash into the San Francisco Bay with the arrival of the first winter rains, creating a new local pollution problem. The San Francisco Chronicle reported Wednesday: The Bay Area’s first rain of the season is washing away worries of wildfire and drought. But it’s also bringing a new concern: gobs of face masks flooding San Francisco Bay. Early season storms typically sweep a slurry of debris from streets and sidewalks into rivers, creeks and bays. This year, the fall flush not only contains the usual gunk, waste experts say, but...