WASHINGTON (AP) — Linking global warming to public health, disease and extreme weather, the Obama administration pressed ahead Friday with tough requirements to limit carbon pollution from new power plants, despite protests from industry and Republicans that it would dim coal’s future.

The proposal, which would set the first national limits on heat-trapping pollution from future power plants, is intended to help reshape where Americans get electricity, moving from a coal-dependent past into a future fired by cleaner sources of energy. It’s also a key step in President Barack Obama’s global warming plans, because it would put in motion proposals to end what he called “the limitless dumping of carbon pollution” from all power plants.

Under the law once the Environmental Protection Agency controls carbon at new plants, it will also control carbon at existing plants — a regulation the agency said Friday it would start work on immediately to meet a June 2014 deadline.

Yet the federal government’s own analysis of the new power plant proposal concludes that it would have a “negligible” impact on carbon dioxide emissions, pose little to no costs for the industry and provide no additional benefits to the public by 2022. That’s because it essentially locks in what was widely expected to happen anyway. Even without new federal regulations, the agency concluded that no new coal plants would have been built without carbon controls. Instead, the bulk of new power in this country would be supplied by natural gas, which already meets the standard announced Friday.

“The EPA … does not anticipate this rule will have any impacts on the price of electricity, employment or labor markets or the U.S. economy,” the EPA wrote in its analysis.

The industry, and its allies in Congress, quickly dismissed that conclusion.

Sen. Joe Manchin, D-W.Va., said the agency was holding the coal industry to “impossible standards.”

“If these regulations go into effect,” he said, “American jobs will be lost, electricity prices will soar and economic uncertainty will grow.”

Deck Slone, a senior vice president at Arch Coal, said that the technology was simply not available to clean coal plant emissions.

“We believe that coal plants with near-zero greenhouse gas emissions will be achievable in time, but such technology is simply not available today,” he said. “The administration’s proposal goes way too far, way too fast — and threatens to arrest rather than spur technology advances.”

EPA administrator Gina McCarthy said in a speech Friday that rather than damage an industry, the proposed regulations would help the industry to adapt, by encouraging energy companies to develop ways to reduce carbon dioxide, the chief greenhouse gas, from burning coal.

“This proposal, rather than killing future coal, actually sets up a certain pathway forward for coal to continue to be part of the diverse mix in this country,” McCarthy said. “We know that coal is going to be part of the energy generation that we rely on substantially over the next few decades. Why wouldn’t we now acknowledge and invest in the kind of technologies that will allow coal a future long beyond that?”

McCarthy pressed her case by linking global warming to environmental problems that include severe weather, disease and worsening of other types of air pollution.

“We know this is not just about melting glaciers,” McCarthy said. “Climate change — caused by carbon pollution — is one of the most significant public health threats of our time.”

Despite some tweaks, the rule packs the same punch as one announced last year, which received more than 2.5 million comments and was legally vulnerable because it required coal and natural gas to meet the same limit.

Coal and natural gas now have separate standards, but the effect is the same: New coal-fired power plants will need to install expensive technology to capture between 30 and 50 percent of their carbon dioxide and bury it underground. No coal-fired power plant has done that yet, in large part because of the cost. Virtually all new natural gas plants would meet the standard without additional controls.

The EPA’s own analysis says that a new natural gas-fired plant would cost $891 per kilowatt. But a new coal plant built to meet the standard would cost between $3,274 and $3,301 per kilowatt.

Environmental groups praised the proposal for taking action against the largest remaining uncontrolled source of greenhouse gas pollution. That pollution, the EPA said Friday, is worsening air quality, water quality, disease and contributing to more severe weather.

“Big polluters have been getting a free ride for decades, while Americans foot the bill in the form of asthma attacks, respiratory illness, floods, wildfires and superstorms,” said Michael Brune, executive director of the Sierra Club.

The regulations have been in the works since 2011 and stem from a 1970 law passed by Congress to control air pollution. In 2007, the Supreme Court ruled that law, the Clean Air Act, could be applied to heat-trapping pollution. The EPA already has issued rules aimed at curbing global warming pollution from automobiles and the largest industrial sources.

Coal was already struggling to compete with cheaper natural gas. It now accounts for about 40 percent of U.S. electricity, a share that was already shrinking.

The EPA pointed to four coal-fired power plants under development — in Texas, Mississippi, California and Saskatchewan, Canada — to show that the rule is possible to meet.

Yet one of the companies behind those plants, Southern Co., said Friday that its Kemper County Energy Facility in Mississippi “cannot be consistently replicated on a national scale.” The facility, scheduled to open in May 2014, is located close to low-cost lignite coal. It is also adjacent to an oil field, where the carbon dioxide will be injected to produce more oil.

The company also has received hundreds of millions of dollars in federal grants and tax credits to offset the cost.

The revised standards, the company said in a statement, “essentially eliminate coal as a future generation option.”

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