Vehicle is important to modern people for almost years. The favorite one is car or motorcycle. But, did you know they have negative effect to body. Yes, their smoke (exhausted) is very dangerous. It contains so many harm particle. One of them is CO2 or carbon dioxide. We have to aware to reduce step by step using car or motorcycle. Bicycle is one of alternative save and friendly vehicle to environment. Save our fresh air by prefer to choose non petroleum vehicles. Change our habits to health and cheap vehicle. Do not wait until vehicle polution kill you body. Greening your world seriously.