The House is expected to vote on a non-binding resolution later this week opposing a nationwide carbon tax on fossil fuels as part of any policy to address global warming.

The floor vote is sparking a conservative rush to rally lawmakers to back the measure.

The free-market American Energy Alliance began an Internet ad blitz Tuesday as part of a campaign to gain votes to show the Congress is standing firm against the idea of placing a carbon tax, or fee, on fossil fuels.

"The resolution opposes any carbon tax proposals and expresses the sense of Congress that a carbon tax would be detrimental to the United States economy," the group said.

The group says it is running an initiative all week to urge lawmakers to support the "anti-carbon tax resolution" introduced by Majority Whip Steve Scalise, R-La.

"The ads call on constituents to contact their representatives and tell them to vote in favor of the Scalise resolution," it said. "AEA will also issue a key-vote later this week urging lawmakers to support the Scalise resolution." The vote is expected on Thursday.

A carbon tax has not been imposed by the U.S., although the Obama administration continues to try.

President Obama wants to attach a $10 tax to each barrel of crude oil produced in the country. The idea has been met by lawmakers' concerns that such a fee would drive up the cost of energy.

The administration says recent low oil prices make it an ideal time to enact such a fee. The president wants to use the revenue collected from the tax to fund an advanced transportation system that would support his climate change agenda.

A nationwide carbon tax would impose a fee on the use of all fossil fuels to make cleaner energy sources more competitive and drive investment in solar and wind.

Critics of such a tax say it would drive up energy prices and drive away business and jobs.

The House leadership will set the calendar on Wednesday for which day the resolutions will be taken up, but many are eyeing Thursday for a vote on the resolutions.