Global forest destruction seen overestimated

The amount of carbon emissions caused by world forest destruction is likely far less than the 20 percent figure being widely used before global climate talks in December, said the head of the Brazilian institute that measures Amazon deforestation. Gilberto Camara, the director of Brazil's respected National Institute for Space Research, said the 20 percent tally was based on poor science but that rich countries had no interest in questioning it because the number put more pressure on developing countries to stem greenhouse gases. A lower estimate for carbon emissions from deforestation would have an impact on the Copenhagen talks, where preserving forests is a top item on the agenda. Given that the Amazon accounts for about a quarter of deforestation globally, a figure of about 10 percent for total emissions caused by forest destruction is likely to be more accurate, Camara said. The 20 percent figure used by the Intergovernmental Panel on Climate Change was based on calculations from sampling of forests by the United Nations Food and Agriculture Organization (FAO), he said. The FAO method came up with an average annual figure of 31,000 sq km (12,000 sq miles) deforested in the Amazon from 2000-2005. But Brazil's method of using satellite images to measure deforestation "pixel by pixel" was far more accurate and showed a figure of 21,500 sq km for the period, Camara said. For 2005-2009, the FAO estimate was double the correct figure, Camara said. "The FAO grossly overestimated deforestation in Brazil and there are papers that show that such overestimation is also true for many other countries, including of course Indonesia."...Reuters