Cell phones emit radiation, which increases the possibility of people developing tumors in the brain.

The argument

Cell phones emit radiofrequency radiation, which has been shown to have distinct biological effects. Heating occurs when the radiation from cell phones is absorbed by the body, and at least one study has shown a higher incidence of tumors in rats exposed to high levels of cell phone radiation. Given that the human body also absorbs this radiation, it makes sense to conclude that cell phones can cause cancer in humans as well. When turned on, cell phones and other wireless devices emit RF radiation continually, even if they are not being actively used, because they are always communicating with cell towers. The dose of intensity tails off with increasing distance from the body, and reaches a maximum when the devices are used next to the head during phone calls or in front of the body during texting or tweeting. A few epidemiology studies have reported higher rates of tumors inside the skull among people who use cell phones heavily for 10 years or more. Of particular concern are benign Schwann cell tumors called acoustic neuromas, which affect nerve cells connecting the inner ear with structures inside the brain. These growths can in some instances progress to malignant cancer with time.

Premises

Counter-arguments

The amount of radiation that cell phones emit does little harm to the human body. Cell phones also emit radiation because it is essential to their function. That’s how they communicate: transmitting and receiving radio waves. These radio waves are far less energetic than the light waves from a flashlight or the thermal radiation from a stove. All working phones have radiation, and a cell phone that emits no radiation is a cell phone that is not communicating. All this should tell the fact that “radiation” is a very broad term. It includes ionizing radiation that can destroy or alter DNA in your cells. But it also includes visible light, thermal radiation, and radio waves. Cell phones, stoves or flashlights do not emit ionizing radiation. Nor do cell phones emit non-ionizing radiation in sufficient quantities to thermally damage tissue, like a strong light, a hot stove, or for that matter, a microwave oven could.

Rejecting the premises

[Rejecting P1] "Distinct biological effects" is asserted exactly where precision is needed. Radiofrequency energy is non-ionising: it is absorbed as heat rather than breaking chemical bonds, which is why exposure limits are set by heating and why the argument owes a non-thermal mechanism it never names. The rodent study alluded to used whole-body exposure across a lifetime at levels far above what a handset delivers, found the effect in males only, and reported exposed animals outliving controls — results its own investigators described as difficult to apply to people. [Rejecting P2] The epidemiology is being read in one direction. Some case-control studies do report raised rates among the heaviest long-term users, and they depend on participants recalling their own past phone use, a known source of bias; the large cohort and registry studies have not found a corresponding rise, and brain-tumour incidence has stayed broadly flat across decades in which mobile use became near-universal. The acoustic neuroma point also weakens the case rather than strengthening it, since these tumours are benign and malignant transformation is very rare. [Rejecting C] The conclusion moves from emission to risk in one step. That phones emit radiofrequency energy is not in question, and the classification most often cited on this side — possibly carcinogenic — records that the evidence is limited and unresolved, which is a reason for continued study rather than a finding of increased risk.