Now that a giant city-wide Wi-Fi network is being launched, paranoid hypochondriacs are coming out of the woodwork to proclaim that these devices will have unpredictable health effects, for the same reasons that cellphones cause brain cancer.
Are these risks serious? Technically, nobody knows for sure. Studies of cellphone use haven’t found a definitive link between long-term use and any cancer, but cellphones have only been in widespread use for about a decade.
But here’s what we do know: