I'm a scientist (certified for radioactive & x-ray research) so I totally hear the point to be made regarding something not being a fact until a thorough investigation has been done on the matter. However, the fact that electromagnetic wave cause harm or may have secondary effect in some people is not that far fetched and should not be discarded as "is anyone really still concerned". We just don't have a sample size of individuals troubled by it that is sufficiently large enough to prove it. The majority of us may show no signs of harm; yet I know of at least two people that suffer from electromagnetic hypersensitivity, probably resulting from having 30 different wifi signals crossing their walls day & night for the last ten years. Indeed, I don't believe cell-phone tower signals at long range are really the cause. It's more likely to be the high concentration of wifi signals inside of apartment complexes. And even if the exposure intensity is a matter of square root with respect to distance from source, you can get significant exposure when you increase the number of source or the relative average distance you are from them. So no, electromagnetic waves is nothing to sneeze at. If you think so, why don't you go sleep every night in a tiny room with 15 wifi routers on and a couple of cell-towers directly above your head?