Max has read that the iPhone 7 emits twice as much radiation than any other phone and he's concerned his wife is being exposed. Leo says that radiation coming off a phone is "non-ionizing," which means it poses no harm to people. There is no evidence that cellphone use contributes to brain cancer. In fact, brain cancer statistics have gone down over the same time as smartphone use has gone up.
Theresa has been hearing about 5G and recently found out they're getting a new cell tower in her neighborhood. Is living near a cell tower safe? Leo says absolutely, there's no real issue with radiation: it's a myth. It's also really small, and the energy of radiation decreases exponentially as it gets farther away from the tower. So there's no need to worry. But the big challenge of 5G is that it requires more towers. The real evidence is, that it's harmless. Think about how often you hold a cellphone to your head: there's simply not enough energy to do any damage.
Rick hears that Wifi and cellphones can cause cancer due to radiation. Leo says that there is a lot of disinformation out there and fearmongering. Radiation from these sources exist, but they diminish rapidly with distance. There no known issue with WiFi or Cellphone waves... not even high power electrical lines.
Veronica wants to know if keeping her phone in Airplane Mode will expose her to less radiation. Leo says yes, it would. Can she also use Wi-Fi calling? Leo says it's better, but there's no evidence that it will or won't be harmful. The radiation would come from the cell phone radio, not the Wi-Fi. Using headphones instead of putting her phone up to her ear is also better.
We now have evidence that cell phone radiation can cause cancer in male rats. It is not cause for concern yet, as we are waiting for recommendations from the FDA and others. As always with these kinds of studies, the rats were exposed to a lot of radiation over two years. The original federal studies from the US National Toxicology Program, which uses labels to suggest how strong the evidence is, labeled the evidence "equivocal." That's the second lowest on the scale that the NTP uses, meaning there wasn't enough evidence to really make a connection.