BANGALORE, INDIA: The Environmental Working Group (EWG) has created a new user-friendly interactive online guide to cell phone emissions, covering over 1,000 phones currently on the market.

According to the EWG, about four billion people around the globe own cell phones. As the market for new devices has grown, so have concerns about the safety of cell phone radiation.

Recent studies find significantly higher risks for brain and salivary gland tumors among people using cell phones for 10 years or longer. The state of the science is provocative and troubling, and much more research is essential.

Here is the list of 10 most safe phones:

The U.S. government ought to require cell phone companies to label their products’ radiation output so that consumers can do the numbers at the point of sale.