"I think this is just one more piece of evidence amid a number of pieces of evidence that e-cigarettes are not absolutely safe," says David Peyton, a chemistry professor at Portland State University who helped conduct the research
This vapor creeps into cracks, crevices and even treats cabin filters, deodorizing every surface that it comes in contact with
That means departments have no reliable way to tell if officers are high on the job or whether they are testing positive because they used cannabis more than 24 hours ago or even a few days ago
This applies to most wild animals, from small pets to larger animals like deer, or raccoons
Meanwhile, the smoking rate among high school students nationally has fallen steadily in recent years, reaching about 9 percent among high schoolers in 2014, according to the Centers for Disease Control