A technology initially promoted to help cigarette smokers has transformed marijuana use, too. Now, with cases of severe lung illness rising, health investigators are warning people to stop vaping cannabis.
A decade after Congress gave the F.D.A. the power to regulate tobacco products like e-cigarettes, the federal government has repeatedly delayed or weakened efforts that could have protected teenagers.
Doctors at the Mayo Clinic examined samples of lung tissue from 17 patients, all of which looked as if the people had been exposed to toxic chemicals, the researchers said.
American industry, aided by federal regulators, is conducting a large-scale, consequential experiment with our hormones and the developing brains and reproductive systems of our children.
