debra davis is the president of the environmental -- thanks for joining us.hat is it that the industry knows about cell phone that is you say they're not telling us? >> they know that cell phones are two-way microwave radios and you should never hold them close to the bodies. they also know that these radio frequency signals from cell phones can damage dna and in animal studies show damage to the brain, liver, eyes and skin. >> not to be naive, but it's f it's true, what you're saying, what would it do for the cell phone companies not to tell us? i say this because it's not the same as cigarette where is when you find out they're dangerous, the only option is to stop. with cell phones, there are alternatives, things you can do to mitigate having a cell phone next to your head. why wouldn't they tell us? >> because there's a general sense, if you understand you need to be careful using a cell phone, some people might decide not to use them at all. that's why right now in europe they're resisting the idea that you can have on/off switches very easily. we need t