ehem ... jo got a lighter .. heheSmoking 1.5 packs of cigarettes per day: 80000 microsieverts/year (This is because there is natural radioactive dust that settles on the tobacco leaves while the plants are growing. Then, it gets rolled up into the cigarette, and when you smoke it, you breathe it into your lungs, which are one of the more radiation-sensitve organs in the body.)