dr. thomas freeden is the head of the centers for disease control. >> anything that increases tobacco useing to be a big problem. we know there are several things that are very concerning. and one is the rapid increase of kids using e-cigarettes. >> this year alone sales are expected to reach $1 billion, still well below the $80 billion figure for conventional cigarettes. only 20 states prohibit sales to minors. each of the big three u.s. tobacco companies are working on their own electronic products. it is shaped like a cigarette and about the same size. an interpal battery heating a warming unit. to some the draw of e-cigarettes is the freedom it gives to puff away. >> it was the ease of it, you can do it inside. >> he is a radio producer and gets stuck in the studio for hours on end without a cigarette. and it helps's his caveings. >> i got them because i couldn't leave my desk at work for long period of time. and i was like this is nice. >> some say too nice. >> this is clearly, clearly something that is being done to get kids hooked. >> in a survey released by the cdc, 1.8 million mi