General Motors Corp. says it hopes to begin pumping hundreds of hydrogen fuel-cell vehicles a year into ordinary buyers’ hands through GM dealerships beginning in 2011.

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Fuel cell vehicles use a completely different propulsion system than conventional vehicles, which can be two to three times more efficient. Unlike conventional vehicles, they produce no harmful exhaust emissions-their only emission is water. Other benefits include increasing U.S. energy security and strengthening the economy.

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Hydrogen can be produced from diverse domestic resources, with the potential for near-zero greenhouse gas emissions. Once produced, it generates power without exhaust emissions in fuel cells. It holds promise for economic growth in both the stationary and transportation energy sectors.

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The interest in hydrogen as an alternative transportation fuel stems from its clean-burning qualities, its potential for domestic production, and the fuel cell vehicle’s potential for high efficiency (two to three times more efficient than gasoline vehicles). Hydrogen is considered an alternative fuel under the Energy Policy Act of 1992.

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Hydrogen is the simplest and most abundant element in the universe-it is number 1 on the periodic table of elements (this link takes you to Los Alamos National Laboratory’s site). At Earth surface temperatures and pressures, it is a colorless, odorless gas (H₂). However, hydrogen is rarely found alone in nature. It is usually bonded with other elements.

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