It is also the cause of neurological degeneration and disease. Melatonin supplements might be helpful. The signal is pulsed to produce the digital signal. Pulses are shown to be worse than continuous waves in causing cell damage and cancer. My children spend hours writing reports and doing homework on the computer, not to mention games and surfing the web, and I am concerned about what potential health hazards this may pose.
Modern screens have much lower emission levels than older computers.
This is radio frequency radiation which penetrates tissue more effectively than low frequency fields. This kind of result is indicative of cause and effect. So they do expose our heads to measurable RF radiation. Hence, portable non-cell phones are low risk, but not risk free. Some people report a 'fuzzy head' after a long call on a portable phone.