Fuel Cell Technology:
Fuel cell's technologies (FCT) are 
technological solutions for the generation of energy that can find considerable potential applications in the domains of stationary power, automotive and portable equipment markets. [1]
Until recently, fuel cells have not received the attention they deserve because of the cost associated with producing and storing hydrogen. The major push for FCT came after California passed a law to reduce greenhouse gas emissions. The automotive industry is now starting to pay closer attention to the capabilities of fuel cells because they produce no carbon dioxide, which in return will help slow down the greenhouse effect.
Clean air legislation:
California lawmakers have passed legislation aimed at reducing greenhouse-gas emissions. About 40 percent of the state's carbon dioxide emissions come from cars and light trucks. The legislation, which Gov. Gray Davis will likely sign into law this month, would:
- Allow the state's Air Resources Board to set standards for the "maximum feasible reduction" of greenhouse gases emitted by cars and light trucks.
- Require the new emissions regulations no later than Jan. 1, 2005 for the 2009 model year.
- Allow the legislature to review, revise and/or reject the regulations before Jan. 1, 2006.
- Prohibit the Air Resources Board from raising gasoline taxes, limiting the number of miles a consumer drives, or outlawing any specific type of vehicle.
- Likely result in more fuel-efficient vehicles for sale in California, since consuming less fuel is the only known way of reducing carbon dioxide and other greenhouse gas emissions.
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References:
[1] - Avadikyan, Cohendet, Héraud (Eds.) "The Economic Dynamics of Fuel Cell Technologies", Springer-Verlag Berlin Heidelberg 2003