William Tanenbaum's popular new series on hot topics in green technology law continues this month with a discussion of the regulatory and technology issues involved in reducing energy costs and emissions in IT infrastructures and at data centers. Topics include: 1. Contracting for service levels to increase energy efficiency and reduce emissions; 2. Energy ratings for IT equipment promulgated by the Department of Energy and the EPA; and 3. Will the Department of Energy and the EPA adopt a carbon credit trading scheme for IT operations?