Environmentalist activity worldwide has increased massively in recent years. The need for green vehicles has taken utmost importance. With the increase of global warming and the increase in the price of oil, not to mention the next inevitable scarcity of this resource, alternate energy sources have become a priority. To achieve this goal, automakers are moving in the production of environmentally friendly vehicles much more efficient in terms of the consumption of energy resources. Really efficient vehicles are those that do not produce greenhouse gases or do it in very low proportion.
There are alternatives for environmentally friendly vehicles and they are being marketed as a current reality. However it was thought that automakers were not making the progress necessary to reduce the emission of pollutant gases. This is due to emissions from the same manufacture of vehicles, which were even greater than the emissions obtained from the common use of the same. Until relatively recently full-time hybrid vehicles have highlighted among the various alternatives, that consume hydrogen. More stringent environmentalists think that all the progress made by the automotive industry are still not sufficient, however accept the existence of several automobiles that are friendly to the environment. The most critical point in this process, is out of the hands of own automakers, ecological awareness must be adopted by all users of automotive vehicles.