It is known that electromagnetic radiation (EMR), computers, other consumer electronics, cell phones detrimental to human health. Many people naively believe that to reduce the harmful effects it was imperative to reduce the intensity of electromagnetic radiation. Indeed, if we reduce the intensity of powerful electromagnetic radiation, its harmfulness decreases, but the intensity of electromagnetic radiation of computers, cell phones so small. Research scientists at the Institute of Cell Biophysics (Director Corresponding Member of Russian Academy of Sciences, EE Fesenko) shows that EMR is extremely weak, could hardly understand the physical devices may have on biological objects much more influence than the powerful electromagnetic radiation. Protective screens consumer electronics, not reduced, and often increase the harmfulness of electromagnetic radiation.