First: we don't have it anymore, and it's extremely unlikely that a pretty advanced extra sense just pops up in random people. Second: the Earth's magnetic fiel

First: we don't have it anymore, and it's extremely unlikely that a pretty advanced extra sense just pops up in random people. Second: the Earth's magnetic field is quite static, while radio waves (the supposed contamination source) with some strength ranges from 100kHz to 5GHz. Third: the Earth's magnetic field has always been here, and there always has been EM background noise, so any recent effects must be attributed to intensity.