evidence: The term "radiation" is often used to scare people. Let's get it straight. There's two factors - frequency and intensity. Frequency has a far larger effect on how damaging radiation is. WiFi and other radio communications use a very low frequency - far below visible light. Radiation that actually causes issues, could potentially cause cancer, etc., is usually ionising radiation - they have a very high frequency and can cause mutations in DNA, possibly leading to cancer (more info on that process). The frequency required to be ionising? At least 1,000,000 GHz. That's literally a 500,000 times higher frequency than what WiFi transmits on, 2.4 GHz or 5 GHz. Non-ionising radiation, which WiFi falls under, does little more than transfer heat. Did you know light is also EM radiation? Yup. In fact, light (~500,000 GHz on the near-infrared side, ~750,000 GHz near-ultraviolet) is much closer to ionising radiation than WiFi. Sunlight actually contains some ionising radiation (UVB, UVC - UVA can also cause DNA damage, but it's not in the same way). But you're not going to hide in your house for the rest of your life, are you?