RPT-FEATURE-Trees to fight warming? Insurers ponder risks

By Alister Doyle, Environment Correspondent

OSLO, Nov 27 (Reuters) - Paying landowners to let forests grow is promoted by the United Nations as a viable way to fight global warming, but experts first have to puzzle out how to insure trees against going up in smoke.

Under U.N. plans, owners will get carbon credits to slow the destruction of tropical forests. But fires caused by lightning -- along with other hazards such as storms, insects and illegal logging -- are a big risk for insurers and investors.

A new U.N. climate treaty to include granting forest owners tradeable carbon credits will be discussed by about 190 nations in Poznan, Poland, from Dec. 1-12. The credits could be worth billions of dollars for those agreeing not to cut down trees.

Burning forests to clear land for farming releases about a fifth of all the greenhouse gases blamed for causing climate change. If trees die, the carbon stored as they grew would be released, rendering carbon credits worthless.

"From a formal point of view insurance shouldn't be a problem," said Wojciech Galinsky, who works on U.N. projects to promote green investment in developing countries. "If Tina Turner's legs can be insured, why not forests?"

But there is wide disagreement on how to assess the risks under the new U.N. treaty, due to be agreed by end-2009.

Forest owners want full access to credits as fast as possible. But insurers suggest that half be retained in buffer funds in case forests vanish in a few decades. If a forest disappeared, the credits in the funds would go to them.

"How much land-managers will see of the price is what the excitement is about," said Frances Seymour, head of the Center for International Forestry Research in Indonesia.

Placing a value on forests could give developing nations in Africa, Latin America and Asia a big incentive to do more to slow rising greenhouse gas emissions. But the economic slowdown may make rich nations reluctant to take part.

One difficulty is that protecting a forest in one area of the Amazon or the Congo can lead to more logging or burning of forests to clear farmland elsewhere.

RISING DEMAND

Demand for insurance to cover such forestry projects is not currently very high, said Joachim Herbold, senior underwriter at Munich Re's department for agricultural insurance: "We expect a rising demand in future," he added.

The market could be huge. About 7.3 million hectares (18.04 million acres) of forest -- an area the size of Panama -- vanishes every year, according to U.N. data.

A European Union report last month said it would cost 15-25 billion euros a year from now to halve deforestation rates by 2020, mainly by paying people to safeguard existing trees.

Risks that forests will not be standing in a few decades mean that forest carbon credits trade for just $2 to $3 a tonne on voluntary markets, said to Phil Cottle, head of London-based ForestRe which specialises in forestry insurance.