We've got three big hurdles before we see a new Energy Bill enacted: substantive, procedural, and presidential.
First, the substantive hurdle: the House and Senate bills differ on key points, such as fuel economy standards, a national renewable electricity standard, and energy taxes (I have reprinted a side-by-side comparison below). Merging the bills won't be easy.
Second, the procedural hurdle: both chambers must "formally be considering the same legislation," as E&E Daily ($ub. req'd) explains:
The Senate in June passed its amendment to H.R. 6, which is the energy bill the House passed during the new Democratic majority's opening 100 hour legislative blitz in January. Then the House last month passed a much more sweeping bill than its January effort and a companion $15 billion energy tax package.
"Right now we are in this interesting situation where we have two bills out there," said David Marks, a spokesman for Senate Energy and Natural Resources Committee Chairman Jeff Bingaman (D-N.M.). "There is this procedural hurdle to get over first."
Third, the presidential hurdle: Bush must sign whatever passes before it becomes law. And that is not a sure thing.
Side-by-Side Comparison
This chart from E&E Daily compares the House-passed energy bill, H.R. 3221 (on the left), with the Senate-passed energy bill, H.R. 6 (on the right):