Republicans in the House of Representatives introduced a bill today that would permanently stop the Environmental Protection Agency from regulating emissions blamed for warming the planet.

President Barack Obama would veto a bill that permanently blocks the agency from tackling climate change, administration officials have said. Obama has pledged to the world the United States will cut greenhouse gases to about 17 percent below 2005 levels by 2020.

Rep. Fred Upton (R-Mich.), the chairman of the House Energy and Commerce Committee, introduced the bill, called the Energy Tax Prevention Act.

Sen. James Inhofe (R-Okla.), a climate skeptic who is writing a book on global warming called "The Hoax," also plans to introduce a version of the legislation today.

"The EPA is pursuing a dramatic shift in our nation's energy and environmental policy that would send shock waves through our economy," said Ed Whitfield (R-Ky.), the chair of the House Energy and Power Subcommittee, who co-sponsored the bill.

The Supreme Court ruled in 2007 that the EPA could regulate greenhouse gases under federal law. The agency then declared that the emissions endanger public health, which paved the way for its regulation of them.

Collin Peterson, a Democrat from Minnesota, and Dan Boren, a Democrat from Oklahoma, also signed onto the House bill. Republicans hope to have at least one Democrat from the Senate on board today.

The bill, a draft copy of which Upton and Inhofe released earlier this month, will likely first go to a vote in the Republican-controlled House. If it passes, Republicans hope it will gain momentum in the Senate and pick up Democrats from industrial states who face tough elections next year.

Some Democrats may find it hard to vote against a bill that aims to stop regulations some businesses say will shut factories and hurt jobs.

Sen. Joe Manchin from coal-rich West Virginia, who ran a campaign ad last year in which he shot a copy of a climate bill with a rifle, is one Democrat who Republicans hope will support the bill.

Power companies: EPA gives investment certainty Analysts have said the legislation could face a tough battle because a permanent blockage of EPA regulations is too harsh in scope to get the 60 votes needed to pass in the Senate.

Analysts have said there is a better chance for passage of a bill pushed by Sen. Jay Rockefeller, a West Virginia Democrat, which would delay the EPA from taking action for two years.

Many big power companies, such as New Jersey-based NRG Energy, have said they want the EPA to continue regulating as it would give them more certainty in investing in future power plants.

The EPA in January began requiring big industries to hold permits for emitting greenhouse gases, the first step in regulating the pollution. The agency plans to propose performance standards on power plants in July and oil refiners in December that would limit their emissions.

Environmentalists decried the introduction of the legislation. "These two bills are yet more Dirty Air Acts intended to give the nation's biggest polluters a way out of limits to their carbon dioxide pollution that's likely to exacerbate asthma and lung diseases by worsening smog, and increase deadly heat waves and extreme weather conditions," said Earthjustice legislative representative Sarah Saylor.

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