"The increasing number of cases of brain tumors since the introduction of mobile radio devices is well known. These initially operated in the 450 MHz range. Later 900 Mhz was standard and then 1.8 Ghz was added. This microwave radiation warms the tissue. If you have a mobile phone device on your ear for a longer time, you know this warming effect. The device manufacturers recommend today for „liability“ reasons to use the devices with distance to the head. This warming has been scientifically documented."   "Low frequencies are known from research on brain waves. The Schumann frequency of approx. 7.8 Hz is a vital electromagnetic frequency, as we know from early space travel. In previously secret mind-control experiments, frequencies in this low-frequency range were also „played“ to negatively influence people. Drugs and frequencies were used."  from a Electrical Engineer