The head of the U.N. forum on climate change Jan Pronk yesterday dubbed President George W. Bush's new energy plan a "disastrous development" for international efforts to slow output of global warming gases. Pronk, who is also the Dutch environment minister, told a Dutch television news program the Bush plan would "undoubtedly" lead to increased output of carbon dioxide, the main greenhouse gas, although he still awaited proposals from the world's biggest polluter on how to cut emissions.