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Do not support alternative fuels simply because you feel it is the best alternative to petroleum. Using corn to create ethanol as an alternative fuel may be good for your vehicle but may lead to starvation in other countries that are dependent on the excess production of corn in America.
The pollution caused by a fuel cell may not be significant. However, the resources that are consumed to manufacture the fuel cell may be far more than the pollution caused by extraction and processing of petroleum.
Those who setup petroleum processing plants never had to worry about these factors. That was a time when the environment was considered indestructible. Today, we are painfully aware of how fragile our ecosystem is. Going in for an automobile that runs on batteries may make you feel good and responsible. However, the production of batteries may pour lead and other toxic substances into the environment.
A bit of comparative analysis is essential to understand the short term and long term impact of various alternative fuels before proceeding. It is also important to consider the possibility of mass usage. There are billions of vehicles in the world today and each and every automobile can access a gas station by simply driving around for a short while. Is it possible to use alternative fuels in such a manner?
You may not be seen on answering these questions before choosing alternative fuels over traditional fuels. However, these issues will have to be sorted out before petroleum is eschewed on a large scale basis and a large number of individuals prefers alternative fuels.