WASHINGTON  Science and politics rarely play nicely together, and a House hearing Tuesday on a bill to strip the Environmental Protection Agency of its power to regulate greenhouse gas emissions proved no exception.

Democrats on the Energy and Commerce Committee’s subcommittee on energy and power demanded the hearing in the hope of slowing the inexorable progress of the bill, known as the Energy Tax Prevention Act of 2011, which enjoys the near-unanimous support of the Republican House majority.

They appear to have failed. Despite some fireworks, the handful of members from both parties who attended the hearing left with the views they arrived with. The subcommittee is expected to approve the bill later this week.

The measure would overturn the E.P.A.’s finding that carbon dioxide and other heat-trapping gases pose a threat to public health and the environment and would bar the agency from writing any regulations to control them. The bill’s sponsors say that the climate science behind the finding is dubious and that the proposed rules would have a devastating impact on the economy.