The possibility that cellphones may cause tumors or brain cancer hasn’t had people worried until recently, when the World Health Organization’s (WHO) International Agency for Research on Cancer a surprising announcement. According to a new study, “heavy” cellphone use (30 or more minutes each day for over 10 years) can increase a person’s risk of getting glioma, a certain type of brain cancer. Although more data needs to prove the link between wireless communications and cancer, the WHO gave it a 2B rating, which means “possibly carcinogenic to humans.” I wouldn’t worry too much about these findings if I were you though. The WHO has slapped a 2B rating onto a number of things like coffee or pickled vegetables. Below is the complete press release if you want more information.