If you know one thing about fracking, it might be that the wells have been linked to explosive tap water. Of course, a tendency toward combustion isn’t the biggest problem with gas-infused water; it’s what could happen to you when you drink it.

Although the natural gas industry is notoriously tight-lipped about the ingredients of the chemical cocktails that get pumped down into wells, by now it’s widely known that the list often includes some pretty scary, dangerous stuff, including hydrochloric acid and ethylene glycol (a.k.a. antifreeze). It’s also no secret that well sites release hazardous gases like methane and benzene (a carcinogen) into the atmosphere.

So just how dangerous are fracking and other natural gas extraction processes for your health (not counting, for the sake of argument, explosions and earthquakes)? Is it true, as an activist-art campaign by Yoko Ono recently posited, that “fracking kills”?