Hydrogen Cars Not Needed, U.S. Experts Say: "Farrell and Keith, associate professor of engineering and public policy at Carnegie Mellon University in Pittsburgh, noted that hydrogen is derived mostly from oil and coal, which produce substantial carbon dioxide.
They said better fuel efficiency, improvements to car technology and stricter environmental rules could reduce air pollution at less than 100th the cost of hydrogen cars and would be more effective for several decades.
'Automobile manufacturers don't need to invest in anything fancy. A wide number of technologies are already on the shelf,' Farrell said. 'The cost would be trivial compared to the changes needed to go to a hydrogen car.'
Other scientists have also questioned the benefits of hydrogen fuel cells. Leading environmental groups have also criticized the U.S. government and Europe for failing to put renewable energy sources such as wind and solar power at the heart of their hydrogen policies. "
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