The Subcommittee on Select Revenue Measures of the House Ways & Means Committee on Energy Tax Incentives.  From the hearing announcement:

The hearing provides Members the opportunity to speak on behalf of specific tax proposals they have introduced in the 109th or 110th Congress that would encourage the development of alternative energy sources, or that would act to reduce carbon dioxide emissions.

The hearing takes place at 2:00 p.m. in 1100 Longworth House Office Building.