The closing this week of the Chicago Climate Exchange, which was envisioned to be the key player in the trillion-dollar "cap and trade" market, was the final nail in the coffin of the Obama administration's effort to pass the controversial program meant to combat global warming.

"It is dead for the foreseeable future," said Myron Ebell, director of the Center for Energy and the Environment with the Competitive Energy Institute, which had fought the measure.

That assessment was echoed by environmentalists as well.

"Economy-wide cap and trade died of what amounts to natural causes in Washington," said Fred Krupp, president of the Environmental Defense Fund, which had supported the plan.

The CCX was set up in 2000 in anticipation of the United States joining Europe and other countries around the world to create a market that would reduce the emission of greenhouse gases. Under the system, factories, utilities and other businesses would be given an emissions target. Those that emitted less fewer regulated gases than their target could sell the "excess" to someone who was above target. Each year, the target figures would be reset lower.

The Exchange was the brainchild of Richard Sandor, an economist and professor at Northwestern University, and it was modeled after a successful program that was launched in 1990 and helped control acid rain in the Midwest. It was initially funded by a $1.1 million grant from the Joyce Foundation of Chicago, and President Obama was a board member at the time.

After the Democrats won the White House, the House and the Senate in 2008, businesses and investors flocked to the exchange, believing Congress would quickly approve the program. And it almost happened.

The House of Representatives passed a bill proposed by Democratic Reps. Henry Waxman of California and Ed Markey of Massachusetts, which would have made cap and trade law. But the Senate couldn't muster the votes, and everything went downhill from there.

"When those that voted for the measure in 2009 went home on July 4th after the vote, they met widespread outrage among their constituents," said Nick Loris, an analyst with Heritage Foundation. Conservatives renamed the idea "cap and tax," and they began an assault on the program.

In the last week, following the Nov. 2 Republican takeover of the House of Representatives, the slide became an avalanche. Investors in CCX, including Sandor and former Vice President Al Gore, sold the exchange to a company involved in commodities trading.

Sale records show that Sandor cleared more than $90 million for his 16 percent stake in the company.

Meanwhile, the White House has dropped all references to cap and trade from its web site; and, unlike the heralded climate summit in Copenhagen last year, a 10-day meeting in Mexico beginning Nov. 29 on the next steps to battle global warming has not even mentioned publicly by the administration.

"The pieces of the puzzle just kept breaking off," Loris said. "And Obama has given up on it.”

But both Loris and Ebell say that isn't necessarily cause for celebrating.

"I would like to have a party and say we won, but the truth is were are still in the middle of it," Ebell said. "The problem is now that the administration changed strategy and is using existing laws and regulations, like the Clean Air Act, the Endangered Species Act and EPA regulations to implement its agenda. And unlike the cap and trade effort, it is much harder to get the public excited about rule changes."

"Obama will try a piecemeal approach," Loris said. "And they have a much better chance of becoming law than cap and trade ever did.”

Republicans in the new Congress, for their part, will try to pass a law "to stop all regulation of greenhouse gases using existing legal authority," Ebell said. "And we are pretty sure we can get 60 votes in the Senate on it."