combustion reactions are exothermic or endothermic

var ch_selected=Math.floor((Math.random()*ch_queries.length)); TRIVIA: By the age of six, Jackson had been working in a South Carolina textile mill like a clean-up boy. Twelve-hour days were not uncommon being a young teenager, and Joe received little in the form of formal education. Sadly, he never learned to learn or write, and in later years would loose time waiting for teammates to order off the menu after which order for himself by repeating something he'd heard. Smoke is released from cigarettes which is the normal reason of smoking. It also affects the skin of body. It causes dark circles or black shadow on lips, and discoloration of teeth. Moreover if your person doesn't really covers his teeth it may ultimately cause full decay of teeth. Moreover it is now proved that living a proper life by not smoking is the greatest way of preventing diseases.