How far will this go?
A bipartisan group of senators, borrowing heavily from California's efforts to fight climate change, fired the starting gun on what's expected to be a long global-warming debate in Congress with a proposal for limits on greenhouse gases affecting every major segment of the nation's economy.
Lawmakers, industry groups and environmentalists have waited months for the bill, which was introduced Thursday by Sen. John Warner, R-Va., and Sen. Joe Lieberman, an independent from Connecticut.
The bill, expected to be the centerpiece of the Senate's efforts to address climate change, would cap emissions and gradually reduce them using a market-oriented cap-and-trade system in which allowances to emit greenhouse gases would be bought and sold.
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