After years of being sidelined in DC, global warming finally takes congressional center stage in June '08 - with the Senate debating a bill that would notch down greenhouse gas emissions by 63% by 2050.

Given the president is likely to veto any climate change bill with mandatory caps on emissions, though, the debates this year will be mostly for show - but they could set up the terms for a global warming bill that has a good shot at passing next year.

To help our readers keep track of what's in the bills Congress is seriously considering, CitizenJoe offers this running tally.

In the Senate

The frontrunner bill in the Senate, S 2191, comes up for debate the week of June 2, when senators are poised to offer up a bunch of amendments.

The bill

The amendments

A few amendments that may come up in debating S 2191 include

• nulear energy: as the bill stands, it doesn't encourage nuclear power to be part of the global warming solution. Some senators may try to change that, proposing amendments that would give incentives for the development of new nuclear power plants, arguing that nuclear energy does nothing to heat up the atmosphere. Anti-nuke advocates, who caution that nuclear waste creates problems of its own, of course will try to stand in their way.