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Since the climate negotiations are proving difficult, some climate strategists have been hard at work searching for solutions outside of the United Nations. One involves preserving forests as carbon storehouses. NPR's Christopher Joyce reports.

CHRISTOPHER JOYCE, BYLINE: The idea has been floating around for years: rich countries that emit lots of climate-warming gases could just pay poorer countries to keep their forests, or even grow them bigger. Forests suck carbon out of the atmosphere. It's like paying someone to put carbon in a storehouse. And it would be cheaper than retrofitting factories and power plants at home. This is called REDD, for short: Reduced Emissions from Deforestation and Forest Degradation. Hans Brasker, foreign minister of Norway, thinks it's a great idea, and not just to slow warming.

HANS BRASKER: We very strongly believe that we will have established a genuine global partnership to save the remaining tropical forest.

JOYCE: Norway is spending about three billion dollars to make REDD happen. But skeptics question whether forest storehouses are safe. What's to stop people from cutting them down someday and releasing all of that carbon back into the atmosphere? What about indigenous people who live in forests? Will they lose their homes if the woods are turned into carbon plantations? At the South Africa climate talks, skeptics sometimes mock the idea of REDD, such as when Simone Lovera from the Global Forest Coalition announced the Muddled Moose Award.

SIMONE LOVERA: Welcome very, very much for this media event to announce the winner of the Muddled Moose Award, to alert people of the big fairy tales that are being told about REDD.

JOYCE: But REDD's backers say it offers something for rich and poor countries alike. And some are not waiting for the United Nations to decide on a final REDD process.

TONY BRUNELLO: International action would be great. But we're not seeing it. We're not seeing it anywhere.

JOYCE: Tony Brunello is a forestry expert with the REDD Offset Working Group in the U.S. Brunello wants California, where he once advised the governor on climate issues, to partner with states in other countries on REDD projects. Even though the U.S. does not limit greenhouse gases, California will, starting in 2013.

BRUNELLO: The fundamental issue is to give a signal to the rest of the world that it's possible, and also a stamp of approval from California, and that people should invest in it.

JOYCE: California businesses will need to buy so-called carbon offsets - projects where someone, somewhere removes carbon from the atmosphere because that's cheaper than doing it themselves. Brunello's group will match those businesses with states like Acre in Brazil and Chiapas in Mexico. Those places have lots of forest they can preserve - for a price. But so far there are no rules for this.

BRUNELLO: How does a company in California - a Pacific Gas and Electric, a Southern California Edison - how would they legally go and talk with the people in Acre in Brazil and do a carbon offset trade?

JOYCE: California officials are open to the idea, but cautious. Mary Nichols runs the state's climate program at the Air Resources Board.

MARY NICHOLS: We don't have the resources ourselves to, you know, to take over the forest management of those parts of the world.

JOYCE: And carbon banks will need to be managed. For example, you'll need to measure exactly how much carbon is stored in a forest, because companies will be paying for it by the ton. Then how do you safeguard your investment? The Amazon, for example, is a carpet of green about two-thirds the size of the continental U.S. Environmental scientist Greg Asner at Stanford University thinks he's got a solution, with something called LIDAR, a special laser carried on an airplane.

GREG ASNER: And that laser is able to pick up the three-dimensional structure of the canopy, all the way down to the ground, and all the layers in between, from the top down to the bottom. It's like a virtual world. You can find the species you're interested in, you can understand its carbon, you can understand how tall the trees are, how many branches they have.

JOYCE: Asner has flown his device over some of the most remote parts of the Amazon. He says he can tell how healthy a forest is, how diverse, and even what kind of animals live there. The offset working group is crafting rules and technical specs for REDD projects. Acre and Chiapas have already passed measures to pave the way there. The team figures if it works for California, they can take it on the road, with or without an international treaty. Christopher Joyce, NPR News.

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