electricity and internal combustion of gasoline, as in hybrid vehicles,
3) Hydrogen generated from wind electrolysis,
4) Hydrogen generated from natural gas
5) Hydrogen generated from coal gasification.
"Wind is the most promising means of generating hydrogen", said Jacobson.
"Switching from a fossil-fuel economy to a hydrogen economy would be subject to technological hurdles, the difficulty of creating a new energy infrastructure, and considerable conversion costs but could provide health, environmental, climate and economic benefits and reduce the reliance on diminishing oil supplies," the Stanford authors wrote.
"Going down the hydrogen pathway is a good thing overall and its a practical thing, and its going to be beneficial in terms of air pollution and climate and health," Jacobson said.
The hydrogen economy is surely on the horizon with California already has several hydrogen filling stations. Most car manufacturers have prototype hydrogen fuel cell vehicles. California even has a test fleet of hydrogen buses.
An interesting aspect discussed was about the concern about hydrogen's explosiveness, Jacobson said "another property of hydrogen - its lightness--may lessen this danger". He gave an example of two cars "one conventional, one hydrogen-powered that were hit from behind. The car powered by an internal combustion engine became engulfed in flames when its gas tank was punctured. But when the hydrogen cars fuel cell was punctured, since hydrogen is 14 times lighter than air, the flames just shot straight up. The car was saved"
"We believe the results are conservative since health costs associated mostly with particles are now thought to be greater than those used in our study," Jacobson said. "In addition, in the future we will have more fossil [fuel] vehicles than we currently have. So the future health benefit of switching will be greater than in our current study, which assumes an insPage: 1 2 3 Related medicine news :1
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