An aerial view of land being cleared to make way for a palm oil plantation at the Rokan Hulu Regency in Indonesia's Riau province July 11, 2007. In recent years, experts say peat bogs have been stoking global warming through increasing greenhouse gas emissions because of massive deforestation and conversion into agricultural land and palm oil plantations, especially in Southeast Asia which accounts for a huge chunk of the world's marshes. Picture taken on July 11, 2007.