The World Health Organization announces that mobile phones are classified as a carcinogen, cautioning that radiation from the phones has been shown to increase the risk of brain tumors and glioma, a malignant form of brain cancer.

http://www.france24.com/en/20110601-mobile-phones-could-cause-brain-cancer-who,
http://edition.cnn.com/2011/HEALTH/05/31/who.cell.phones/index.html