Car, bus, bycicle...

We, but only in the U.S.A. consume 950 million metric tonnes of oil, this costs 1 800 000 000$ and this is only for the last 20 years, the United States is the country which consumes more fossil fuels in the world, the richest countries in the world consume more oil, this is a problem, all the oil will becomes CO2, to avoid this, we have to use more the public transportrather than taxis or cars, we use less vehicles and emite less CO2 to the atmosphere.