Only he who contributes to the future has right to judge the past Friedrich Nietzsche every time we encausamos our own environmental deterioration, is unheard of as the vehicle with all pollution that generates increasingly is demanded by people, even knowing the harmful effects that it causes, especially against the pollution of the environment, health, all this by having a medium which carries it, especialmdente face long distances to the areas of work and still short. Increasingly ladictadura of the car is tax. In unusual as cities are troubled of all kinds of vehicles, until the same houses, streets, tornandose a stress walk in them, by the huge queues that occur; Therefore, we should not misnamed, as you review the EcoPortal.net Webwriting team, which mostly, big cities of Latin America and the Western hemisphere in general, have been diagramed, conceived or adapted to the needs of the automobile.The streets that in the past were used almost exclusively for delimit the space between buildings and give access to the buildings, in the modern city have become, as has grown the importance which we have given to the automobile, in containers of vehicles, with a little extra space on each side, for people.We have reached the limits of the endiosamiento towards the private automobile. We have turned the streets of cities on urban roads, we have given you the plazas, parks and many other spaces, turning them into places for parking. We have widened streets at the expense of their sidewalks and even homes. Vehicles increasingly need more and more space, and we take it. Take note, that nowadays the life on the planet is threatened by the phenomenon of global warming. Essentially produced by the emission of greenhouse gases. The contribution of urban transport to this phenomenon which is causing the increase in the average temperature of the planet is enormous.