The brain of a child absorbs much more radiation than the brain of an adult. Hence, Dr. Martin Blank, Ph.D. from the Department of Physiology and Cellular Biophysics at Columbia University, together with other scientists from around the world, are working on an international appeal to the USA concerning the danger coming from electromagnetic emitting devices such as mobile phones and Wi-Fi networks. At the video below, Dr. Blank lists the dangers of these devices. Moreover, according to numerous studies, cell phone radiation can cause cancer. Additionally, in 2011, The International Agency for Research of Cancer classified radio frequency fields as possible carcinogen. Also, in 2011, the World Health Organization admitted that radiation can be a cause of cancer, based on a cumulative decision made by 31 scientists from 14 different countries.