The advent of Wi-Fi connected high technology devices in executing day-to-day activities is fast evolving especially in developing countries of the world and hence the need to assess its safety among others. The present study was conducted to investigate the injurious effect of radiofrequency emissions from installed Wi-Fi devices in brains of young male rats. Animals were divided into four equal groups; group 1 served as control while groups 2, 3, and 4 were exposed to 2.5 Ghz at intervals of 30, 45, and 60 consecutive days with free access to food and water ad libitum. Alterations in harvested brain tissues were confirmed by histopathological analyses which showed vascular congestion and DNA damage in the brain was assayed using agarose gel electrophoresis. Histomorphometry analyses of their brain tissues showed perivascular congestion and tissue damage as well.
SAR stands for specific absorption rate, a measure of the amount of radio frequency energy absorbed by the body when using a mobile phone. The SAR rating of your cell phone can be found in your instruction manual or possibly online at this Federal Communications Commission website. In the United States, the SAR cannot exceed 1.6 watts per kilogram.
The Federal Communications Commission (FCC),  US Government Accountability Office (GAO),  and the US Food and Drug Administration (FDA),  have all concluded that there is no evidence in the scientific literature proving that cell phones cause brain tumors or other health problems. According to the FDA, "attempts to replicate and confirm the few studies that did show a connection [between cell phone radiation and head tumors] have failed." 
Phone cases are the one accessory everyone needs to keep the dents, scratches, and mishaps of everyday life at bay. They can also help you stay organized on the go with battery cases or wallet functionality. Groupon provides a wide range of cell phone cases for both iPhone and Samsung Galaxy models, from brands such as Otterbox , Insten , and VRS Design .
gamma rays produce virtually no electricity in the human body because the actual inherent energy of gamma rays that actually hits molecules is next to 0. for gamma rays to produce any electricity they would need to hit something much more dense – like lead and for you to generate any significant electricity from gamma rays hitting the earth you would need a huge slab of it.
i say to be as proactive as possible, limited wifi use and all of the above, but we can’t live in bubbles and if all this powerful God given food, supplements, exercise and sunshine is so good for us… then focus on that more than anything. stress of all the unknowns will kill us faster if we obsess about it. live like God wants you to, laugh a lot and stop worrying.
The HARApad is the one I like best. It is a rigid, rugged, easy-to-use laptop pad that contains perfectly safe, military-grade electromagnetic radiation (EMR) shielding. You simply place it underneath your laptop and it protects you from heat, radiation and organ damage caused by the computer. HARApad uses “root technology”, which means each pad is each manufactured from environmentally safe, natural and organic materials.
The increasing use of Wi-Fi in schools and other places has given rise to public concern that the radiofrequency (RF) electromagnetic fields from Wi-Fi have the potential to adversely affect children. The current study measured typical and peak RF levels from Wi-Fi and other sources in 23 schools in Australia. All of the RF measurements were much lower than the reference levels recommended by international guidelines for protection against established health effects. The typical and peak RF levels from Wi-Fi in locations occupied by children in the classroom were of the order of 10-4 and 10-2% of the exposure guidelines, respectively. Typical RF levels in the classroom were similar between Wi-Fi and radio but higher than other sources. In the schoolyard typical RF levels were higher for radio, TV and mobile phone base stations compared to Wi-Fi. The results of this study showed that the typical RF exposure of children from Wi-Fi at school is very low and comparable or lower to other sources in the environment.
The International Agency for Research on Cancer (IARC) has classified cell phone radiation as a possible carcinogen. On May 31, 2011, the International Agency for Research on Cancer (IARC) of the World Health Organization (WHO) issued a press release announcing it had added cell phone radiation to its list of physical agents that are "possibly carcinogenic to humans" (group 2B agents).  The classification was made after a working group of 31 scientists completed a review of previously published studies and found "limited evidence of carcinogenicity" from the radiofrequency electromagnetic fields emitted by wireless phones, radio, television, and radar.