. >> professor susan schick is about to embark on a fda funded study. >> i'm going to model puffing onn e-cigarette. what i'm blowing out is what the person is inhaling. >> this is a mass photometer. >> 400 -- >> we are now actually spiking. this thing won't read over 100 milligrams. so we shifted from micrograms to over 100 milligrams. it's a lot of particles. the reason i care about particles is that breathing particles causes cardiovascular disease. causes people to die from heart attacks, plain and simple. >> do you think that given that we now know that e-cigarette vapor contains these are metal particles? >> there are a lot of pros and cons. electronic cigarettes they haven't identified all 7,000 much those, significantly a lot fewer. in that aspect it's better than conventional cigarettes but i can't come out and say that using electronic cigarettes are carry because use -- credit safer because using these humectins, no one knows. it will collect and it can't be removed. >> do you think that they have this new science coming out and it's driving legislation. do you think it's to