【英语时差8,16】电子烟真的安全吗？（下）（在线收听）

Many health researchers are dubious, though. A 2009 FDA study of e cigarettes found trace amounts of diethylene glycol a solvent linked to kidney failure. And some experts worry that because e cigarettes are marketed as being clean and safe, they may attract young non smokers and lead them down the road to nicotine addiction. To be fair, the point is not that e cigarettes are necessarily a health hazard. Maybe they are, and maybe they’re not. We simply don’t know. Which is why many health experts are calling for e cigarettes to be regulated like drugs and required to meet federal safety standards. Until that happens, trusting that e cigarettes are harmless means relying on the word of the companies that make and sell them.