I remember when they were saying that charcoal causes cancer. (in rats) And for it to cause a problem in humans you would have to eat like 50 lbs of BBQ's meat in one day every day for it to effect you. Why do they keep trying to scare us into not using things that are also "green" How much water do you think you would have to drink per day for how many years for it to have an effect? Don't let those environmentalists scare you. Quilt on, my friend, quilt on.