I remember reading something somewhere a few years ago that stated that second hand smoke is actually deadly for those who are exposed to it. Apparently, we have no filters, like the butt ends do, so we breath in the most toxic part of the cig. I dont have evidence that its bad, or the source to back it up, but i think that it shouldnt be around people who caringly to not smoke. But the problem is on a more global matter so what can a few people do about it?