are you kidding???

tobacco smoke contains carbon monoxide, which is an oxygen inhibitor for your red blood cells. your red cells are like a passenger train, carrying oxygen to your bodys cells, what CO does is get on the train and like a bunch of bully gang members, they prevent the oxygen cells from boarding the train, and it takes up to 12 hours for that to change.

If you are going to be a serious diver, quit smoking. There may come a day when you need every bit of o2 your body can provide, not to mention smoking ruins your bodys natural impulse to breath, based on Co2 levels, not lack of oxygen. think of what your loop must smell like if you dive after smoking....yuk.

on the good side, I heard that over a millon people quit smoking last year.... they died.