Transportation Technologies

Several transportation technologies may also help to reduce carbon emissions. Of these, hydrogen fuel is probably the most attractive because it can be stored and used like gasoline. Hydrogen can be easily produced from water by separating hydrogen from oxygen, but this requires energy, either from fossil fuels or renewable sources. Thus, hydrogen is only as emission-free as the energy that is used to produce it. Other obstacles to hydrogen gas are that it must be compressed or liquefied in order to fit into the size of a typical car's gasoline tank, and numerous hydrogen stations would have to be erected to distribute the fuel, similar to the present-day gas station system. Overcoming these obstacles depends on achieving technological breakthroughs in the future. In addition, even if technical aspects are solved, experts say changing a nation's infrastructure to fit a new type of fuel presents a massive undertaking. Many energy experts are therefore skeptical about whether hydrogen can ever truly replace gasoline as a viable energy source.

Electric vehicles might also lower emissions but they, too, depend on the development of renewable energies to produce clean electric power that can be stored in batteries. Today's electric cars have another major disadvantage—current battery

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Hybrid Cars The Whole Truth Revealed

Hybrid Cars The Whole Truth Revealed

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