A first-of-its-kind study from researchers at Johns Hopkins University has found traces of hundreds of unknown chemicals in electronic cigarette vaping liquid and aerosols. The study details a ...

But new research says that there are chemicals in e-liquids that we didn’t even know to worry about, because they form in the e-liquid bottle or pod after all the ingredients are mixed together.

But what, exactly, is in liquid versions of pot that are vaporized and inhaled? And how does their safety compare to conventional smoked marijuana? There, much is unknown. Smith, as well as some ...