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The Obama administration established new federal greenhouse gas pollution limits. An October executive order requires federal government agencies to set greenhouse gas emission reduction targets that must be met by 2020. All of these actions, along with additional steps forward, will help enhance American economic competitiveness. And on December 7, Environmental Protection Agency Adminstrator Lisa Jackson announced the "endangerment finding" under the Clean Air Act. This enables EPA to finalize limits on global warming pollution from motor vehicles and large industrial sources. President Obama would prefer that Congress, rather than EPA, establish these pollution limits, but the endangerment finding means that EPA will act if Congress fails to do so.

China announced a carbon reduction target. The Obama administration’s hard work with China and India is starting to pay off. China announced on Thanksgiving Day a target of reducing carbon pollution per unit of gross domestic product by 40 to 45 percent from 2005 levels by 2020. This is the first time China has committed to specific carbon reductions. The November joint statement by Presidents Obama and Hu Jintao on the creation of a greenhouse gas inventory between the U.S. EPA and China will make it possible to measure and verify these reductions.

India announced a carbon reduction target. India announced on December 2, soon after the U.S.-India summit in Washington, that it intends to offer a target for decreasing its carbon intensity 24 percent from 2005 levels by 2020. This is the first time India has proposed its own specific carbon reduction target, which adds to its already established commitment to set the largest solar power generation target in the world.

41% of the public says the United States plays a less important and powerful role as a world leader today than it did 10 years ago -- the highest percentage ever in a Pew Research survey.

44% of the public now says China is the world's leading economic power, while just 27% name the United States.

the percentage saying that the United States should "mind its own business internationally and let other countries get along the best they can on their own" has reached an all-time high of 49%.

Obama recently pledged that the United States would reduce emissions about 17 percent by 2020 as compared with 2005 levels (though the Wall Street Journal is reporting that he might soon announce steeper cuts for 2050); his current pledge reflects numbers in bills now under review by Congress. The president probably can't offer much more without risking that any final treaty would later be rejected by Congress, similar to what happened when the U.S. Senate failed to ratify the Kyoto climate treaty in 1997.

Rather than absolute carbon cuts, some developing countries, including China and India, have declared goals of reducing the "carbon intensity" of their economies. In other words, they will use less carbon per unit of GDP growth, but as their overall economies grow, so too will carbon emissions, at least for the short term. China has pledged to reduce the carbon intensity of its economy by 40 to 45 percent. India has a target of 20 to 25 percent. The targets have been applauded by some as a step forward and pilloried by others as far too low.

The upshot: Nothing will happen unless there's money behind it, and for some countries, the financial pledge may be as politically difficult as the carbon-reduction pledge. (Sen. John Kerry has proposed that the United States pony up $2.5 billion to $3 billion, roughly equivalent to the annual budget of the U.S. Food and Drug Administration.) With many industrialized countries stuck in recessions and struggling with high unemployment, short-term generosity will be difficult.

In a classic study of co-operation based on computer simulation, The Evolution of Co-operation, Professor Robert Axelrod of the University of Michigan demonstrated that the most effective winning strategy for inducing co-operation is one that offers cooperation first and then sticks to tit-for-tat – or in other words, strict – reciprocity. By applying this strategy, players (or countries) that want to cement mutually co-operative relationships normally make a co-operative first move and then respond positively to acts of co-operation, and retaliate against cheating with cheating. More encouragingly, such a strategy can be applied to situations where both sides are apparently deadlocked in non-co-operative positions. Bilateral deadlocks can be broken if one side pushes the “reset” button and starts the game anew by offering concessions first.

if large economies keep interest rates loose for too long, faster global growth could instead add fuel to the fire. Tighter monetary policy in the United States and the Euro area is still a way off, but may be edging closer.  The European Central Bank will conclude emergency lending in December. The rate on the final loans will be indexed to the ECB’s benchmark rate, rather than fixed at 1 percent, giving the Bank room to raise interest rates if needed. Unemployment, a key signal for central bankers considering raising rates, fell to 10 percent in the United States last week, but it is not yet clear if this improvement will persist.

These price surges could cause or temporarily conceal bad debts in a number of smaller economies, hurting investors who have turned to these markets. However, unless these surges continue, the risk to the global recovery will be contained. Dubai World’s recent near default illustrates the potential shocks that debt from bursting asset bubbles can cause. Similar problems could and probably will emerge in other economies which have been badly hit by the crisis, and where government finances are stretched, including Ireland, Greece, and the Baltics.