The car 1 cars generally CO2 release into the atmosphere 200 grams per kilometer in the run. Assuming that Thailand a combination in the 1 days 1 million cars and each car running 10 kilometers, vehicles will release into the atmosphere, CO2 = 1 000 000 x, 10 x 0.200 =,, 2 000 000 kg per day. This number is a number which is the number does not assume the reality of a lot. But to show that the weight of the gas of such affecting about global warming.