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Laws now on the books in California, Massachusetts and New York, collectively a quarter of the U.S. auto market, set stringent limits on tailpipe emissions and will require substantial sale of zero-emission cars by 2003.
California is again delaying requirements for zero-emission vehicles, first mandated for the 1998 model year.
Universally applied, zero-emission hydrogen-fuel technology could have a dramatic impact - providing the hydrogen was produced using clean energy.
Combining hydrogen and oxygen in fuel cells generates electricity, pure water, and nothing else, making it the ultimate zero-emission fuel.
In California, zero-emission electric buses can be recharged up to 50% in five minutes and such fast recharging is crucial for the bus's viability
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