Agence France Presse: Global carbon markets could generate billions of dollars each year for developing countries that tackle tropical deforestation, a major source of global warming, according to a new study. Reducing the rate at which Amazonian rain forests are disappearing by only 10 percent, for example, would yield 1.5 to 9.1 billion euros (2.2 to 13.5 billion dollars), depending on world carbon emission prices, researchers calculated. That money could then be plowed into national conservation …