Voice of America: The top U.N. official on climate change says industrialized countries need to offer more incentives to China and other developing countries to reduce gas emissions. Daniel Schearf reports for VOA from Beijing that China is fast overtaking the United States as the world’s biggest emitter of greenhouse gasses, believed by many scientists to be warming the planet. The U.N. official in charge of the framework convention on climate change, Yvo de Boer, says wealthy nations need to offer …