I read somewhere, many years ago, that there were thousands of suspected carcinogens, but only dozens of known carcinogens. The known carcinogens are things tha

I read somewhere, many years ago, that there were thousands of suspected carcinogens, but only dozens of known carcinogens. The known carcinogens are things that raise your (fairly low) chance of getting some particular form of cancer by a factor of ten or a hundred or a thousand -- things like cigarette smoke and ionizing radiation. The suspected carcinogens are things that may or may not raise your chance of getting some particular form of cancer by a few percent. We'll likely never know whether some of these things really do cause cancer, because you're looking for tiny correlations in data which is already pretty sparse. Anyway, either you'll get brain cancer or you won't. The difference made by using or not using a phone is not a significant factor in determining the way you die. Unless, of course, you use it while driving. Heck, even using it while crossing the street has probably cost thousands of lives so far.