Green Smoke™ allows you to breathe again. It contains no tar, carbon monoxide and other dangerous toxins. There is nothing in it to clog and blacken your lungs. Green Smoke™ contains mainly water, nicotine and propylene glycol (a common additive in food coloring and cake mixes). The Green Smoke electric cigarette gives you your nicotine, without taking a toll on your lungs and heart. Green Smoke™ is independently tested for safe ingredients.