Washington Post: THE RUNNING joke in Washington is that nobody has read the 900-plus-page energy bill sponsored by Reps. Henry A. Waxman (D-Calif.) and Edward J. Markey (D-Mass.), which the House will consider in coming weeks. What you hear from its backers is that its cap-and-trade provisions would create a market-based program to reduce greenhouse gas emissions — which should mean that a simple, systemwide incentive encourages polluters to make the easiest reductions in greenhouse gases first, keeping the …