the bulge in the battle of the bulge was _______

French Spiderman Alain Robert has finished his latest climbing the tallest building in the world. Alain has successfully reached the top in the tapered spire across the 160th floor from the building. The 47-year-old is renowned for climbing buildings all over the world just using bare hands and climbing shoes. The black exhaust Black appears to be a depressing color. The reason ought to be rich mixture. That is to say, the mixture of gas in cylinder component is at night normal level. The incomplete combustion gas inside combustion chamber cause the carbon particle exhausted with all the waste gas. Failure is likely to come from the following reason: