Recall bias, which can occur when data about prior habits and exposures are collected from study participants using questionnaires administered after diagnosis of a disease in some of the participants. It is possible that study participants who have brain tumors may remember their cell phone use differently from individuals without brain tumors. Many epidemiologic studies of cell phone use and brain cancer risk lack verifiable data about the total amount of cell phone use over time. In addition, people who develop a brain tumor may have a tendency to recall cell phone use mostly on the same side of the head where their tumor was found, regardless of whether they actually used their phone on that side of the head a lot or only a little.
gamma rays are constantly going through you as we speak as are wifi. that doesn’t mean however that you can create much usable electricity from them. you cannot. because the amount of energy inherent in these is miniscule. actually for somebody making judgements about what other people may or may not be you seem to be very ignorant about basic facts.
7. Keep it locked. “Make sure that you have a secret PIN (personal identification number), a password, fingerprint setting or other security measures in place so that only you can access your phone.” – National Cyber Security Alliance, June is Internet Safety Month! The National Cyber Security Alliance (NCSA) and ConnectSafely Share Tips to Ensure Online Safety and Summertime Fun, PR Newswire; Twitter: @PRNewswire
In addition, earthing allows our bodies to synch with the Schumann resonance (7.83 Hz), which is earth’s own electromagnetic frequency that we are naturally built to be exposed to. A Japanese study in 2005 showed that the Schumann resonance can reduce blood pressure and produce some positive health outcomes. By synching with earth’s natural frequency, we reduce the risks of WiFi waves interfering with our bodily functions.
For those thinking that wireless keyboards and mice are OK, these things can put out quite a significant signal and some at frequencies of 2.4 GHz. I have personally experienced terrible symptoms from one of these. The 27MHz analog transmitters are more benign but probably still significant for the electrosensitive, and can probably still harm anyone.
If you use a USB Wi-Fi adapter (for PCs that don’t have a built in wireless network interface card) use it on a USB extension cable (10 feet or more). The same goes if you use a 3G or 4G USB internet stick, or dongle, to connect to the Internet while you’re traveling. A USB extension cable will significantly reduce your exposure. Tip: the further the USB internet stick is from you when you’re surfing the Web, the less you will be exposed.  Buy a USB extension that’s a good 10 to 15 feet long.
We do have evidence that cellphones (or WiFi) do NOT cause an increase in brain tumors. Look at the time period over which cellphone use became common -- say, over the last twenty years. During that time, the incidence of brain tumors has remained absolutely flat. With over four billion people using cellphones (or WiFi) today, if there was any influence on the development of brain tumors, we would be seeing that by now.
The aim of this study was to investigate electromagnetic radiation (EMR) transmitted by wireless devices (2.45 GHz, 3h/day for 30 days), which may cause physiopathological or ultrastructural changes, in the testes of rats and address if the supplemental gallic acid (GA) may reduce these adverse effects. EMR only group was shown to have higher oxidative stress, decreased testosterone and VEGF levels, increased prostaglandin E2 and CGRP, as well as decreased numbers of spermatozoa. Long term EMR exposure resulted in testicular physiopathology via oxidative damage and inflammation. GA may have ameliorative effects on the prepubertal rat testes physiopathology.
It is concluded that radiofrequency radiations are genotoxic as they induced chromosomal aberrations in chickpea mitotic cells and the presence of ghost cells is clear indication of their carcinogenic potential. To avoid reported DNA damages in this work cell phones should always be used either for short duration or with hands-free for long duration and they should not be kept in pockets or near body. Laptops should not be used unnecessarily for enjoyment purpose. It must be placed on desk top rather lap to minimize their exposure to human body. Further assay of carcinogenity are recommended on mouse and human cell lines.
Reading the last paragraph of the previous section you might be saying “Ah hah! Microwaves! Microwaves are bad, they make things very hot and they could burn you!” That’s absolutely true. You would not want to build a human size microwave oven and stand inside it. Nor would you particularly enjoy being the target of the crowd-dispersing microwave cannons built and deployed by the U.S. military.

In the spirit of adventure, I tried the snazzy TwelveSouth case pictured in this post, and I admit, there were some things I liked. I got very used to not carrying around a bulk in my back pocket. I even put my keycard for the office in it, and it felt very futuristic to unlock the office door by holding my phone up to the fob sensor. But in the end, I took the case off before a trip. It just seemed too foolish to risk losing everything at once.
Nevertheless, a group of scientists got together in the mid-2000s, calling themselves the BioInitiative Working Group. This group, which largely consisted of wireless radiation researchers, has written a harsh reply as feedback to the reports claiming that posed no health risks.  The reply lists a wide range of health effects scientists at the European Commission have unfortunately either ignored or dismissed.