High schools in the San Francisco Bay Area are being contaminated by plastics and toxic litter from e-cigarettes, cannabis products and combustible tobacco products such as cigarettes and cigarillos, a new study by researchers at UC San Francisco has found. "We're in the midst of an epidemic of teen e-cigarette use that is causing substantial toxic waste contamination at some high schools from teens discarding these products on the ground," said first author Jeremiah Mock, [...]

"But e-cigarettes are not the only problem," Mock said. [...]