What are the chances that the Senate will pass climate change legislation in 2010?
In December, the political calculations for controlling greenhouse gases dramatically changed.
• The Copenhagen climate change agreement signed by world leaders was weaker than many politicians were seeking.
• Sens. Lindsey Graham, R-S.C.; Joe Lieberman, I/D-Conn; and John Kerry, D-Mass., unveiled the outlines for a new climate bill that's less ambitious than the measure passed by the Senate Environment and Public Works Committee. The lawmakers were vague about when they would introduce the bill.
• Moderate Democrats in the Senate raised red flags on measures to curb carbon pollution through a cap-and-trade program.
• Republicans in the House and Senate announced plans to seek a congressional veto that would stop the EPA from regulating greenhouse gas emissions under the Clean Air Act.
What's next for Senate efforts to curb greenhouse gases?