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The shorter the wavelength, the more energetic and thus, the more potentially damaging (and also the higher the frequency). None of the wavelengths produced by cell phones are ionizing, i.e. have enough energy to break chemical bonds or to ionize atoms by stripping away electrons which can result in damage to DNA and possibly cause cancer. You're right, extremely slight localized heating is (almost certainly) the only thing that can happen to cells as a result of exposure to the extremely low doses of RF typical of cell phones or towers. You might not have known: radio waves are considered to be light every bit as much as the wavelengths we usually associate with visible light, i.e. to see things with. As visible light travels through space over vast distances and time, its wavelength lengthens and will eventually become radio waves that could be heard on a radio as static. |