| Topic : Different fuel options |
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Question posted: 10 31 2008 07:28:12 +0000,
2 answers, 375 views, last activity
11 16 2010 13:20:33 +0000
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It is widely believed that an atmospheric increase in the greenhouse gases CO2 has played a significant role in global warming. Even now, CO2 accounts for less than 1/3 of greenhouse gases. Water vapor, on the other hand, accounts for approximately 70% of all greenhouse gases. The byproduct of hydrogen fuel cells is water vapor. Let's pretend that every vehicle in America is powered by hydrogen say 10 years from now. That's a lot of water vapor! What effect would it have?
Water vapor does not cause global warming. The atmospheric concentration of water vapor is dependent on the atmospheric temperature. Thus water vapor acts as a feedback, but will not initiate warming. We can emit as much water vapor as we want and have no impact whatsoever on global warming.
However, because most of our hydrogen comes from fossil fuels, it has a similar impact on the environment as gasoline. See link below.
http://greenhome.huddler.com/wiki/hydrogen-cars
Hydrogen is called as a freedom fuel. It the future fuel which is abundantly available all over the world.In a fuel cell, electricity is created by a different set of reactants, and the two ingredients that cause the reaction, hydrogen and oxygen, can be replenished. The byproducts of the process are pure water and heat. Shuttle astronauts rely on fuel cell technology to power their life-support systems and other critical functions. Fuel Cell - Promise of Renewable and Clean Energy
The major greenhouse gases are water vapor, which causes about 36–70 percent of the greenhouse effect; carbon dioxide (CO2), which causes 9–26 percent; methane (CH4), which causes 4–9 percent; and ozone (O3), which causes 3–7 percent. But we can control the water vapor by sending it through condenser and condense it to water. You can see details how in space shuttle they are using
http://inventors.about.com/od/fstartinventions/a/fuel_cell_plant.htm
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What effects will hydrogen fuel cells have on the enviroment? |