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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. The preparations for that royal wedding of Prince William and Kate Middleton, the Where's Wally World Record comes about in Dublin, soccer tournament for robots opens in Germany, Volunteers in London raise the understanding cancer of the breast, a human wall was made in Manchester city, and etc are a couple of very impressive news in the previous week. The black exhaust Black seems to be a depressing color. The reason must be rich mixture. That is to say, the amalgamation of gas in cylinder component is at night normal level. The incomplete combustion gas inside combustion chamber result in the carbon particle exhausted with the waste gas. Failure is likely to come from the following reason: When a lot of people picture a fire extinguisher, the picture that's called to mind belongs to a CO2 extinguisher. With their large, metals cylinders of bright red and hard horns, these fire extinguishers have been installed as an emergency measure in homes and businesses for generations. Carbon dioxide extinguishers could be differentiated from similar extinguishers through the lack of any kind of pressure gauge at the top of the tank.