http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2006/12/14/BUGQOMUV3B1.DTL&type=businessCalifornia utilities would be prohibited from buying electricity from most coal-burning power plants in neighboring states under far-reaching regulations proposed by state energy regulators Wednesday.
The rules, which would impose one of California's landmark laws to curb global warming, also would limit the amount of carbon dioxide new power plants in the state could emit. Most climate scientists blame the gas for raising temperatures around the globe.
The rules proposed by the California Public Utilities Commission could have profound long-term implications.
Coal is cheap and abundant. But it produces significantly more carbon dioxide when burned than does natural gas, which fuels most California power plants.
Almost no power plants in California burn coal. But the state imports energy from coal plants located elsewhere. That power accounts for about 20 percent of California's electricity supply. And more coal plants have been proposed throughout the West, some of them designed to ship their electricity to California.
The new rules are intended as a stop-gap measure to prevent a rash of coal plant development before California adopts specific limits on statewide greenhouse gas emissions, possibly by 2010.
Under the rules, the state's investor-owned utilities would not be allowed to buy power from any source that spews more carbon dioxide than does a modern natural gas power plant. Specifically, the source could not emit more than 1,000 pounds of carbon dioxide for every megawatt hour of electricity produced. That's enough energy to light 750 homes for one hour.
"This is really aimed at encouraging new investment, new generation and new power contracts to be clean," said Julie Fitch, director of strategic planning for the utilities commission.