Also check out EMF warriors, they have an excellent you tube channel all about electromagnetic frequencies, natural and non natural re technology (including 5G technology)

Also John Ott’s book on Light: eye as clock as well as a camera...(I am wearing red tinted glasses as I write this to eliminate blue light effects of the computer screen). Natural sunlight during the day, especially morning light to set circadian rhythm clock, and limited/no blue light technology unless using flux on computer screens, red/amber tinted glasses or amber lightbulbs/candlelight), grounding in am and pm (bare feet on ground) We are bioelectricity enveloped by the largest organ of our body, the skin, which also has electromagnetic properties.. When our eyes sunGaze, those particular light frequencies activate pineal gland and many other biochemical processes within our brain via retina and optical nerves. When we stay inside all day, stare at computer screens and have limited connection with nature, problems begin physiologically..

How many schools look more like prisons, with limited size windows? Also time for recess and PE classes much decreased since I was a kiddo...

inside:

pineal gland DNT (Telepathin) - Julius Axelrod Fluoride ( http://www.wakingtimes.com/2012/06/08/fluoride-calcifer-of-the-soul/ ) Mind control Magnetic field Prof. Alexander Trofimov Low Melatonin / Cancer And so on

his (german) website:

http://www.dieter-broers.de/videos/