Cell phones, mobile devices, Wi-fi…basically any wireless communications system produces EMF. Even at low levels, the frequency and proximity of usage increases the potential concerns.
Many of us have joked about cell phones causing brain tumors. Many studies have been conducted to verify this rumor, and the majority of the major studies have found little link between RF exposure and an increase in cancer risk…though most caution that no long-term effects were tested.
On the other hand, studies concerning RF exposure and sleep have found results covering the spectrum (no pun intended). Some of the results have been neutral, but the majority have shown significant effects — oddly enough, some positive results as well as a number of negative ones.
What seems oddly inconsistent is that no country has evidence to show that RF exposure is harmful, and all attempts to sue for cell-related damages have been dismissed or overturned…yet all countries have or abide by guidelines for proximity and safe usage, especially where children are concerned. Given the commercial penetration of wireless technology, few may be willing to look deep enough to uncover anything troubling.