Xinhua: U.S. President George W. Bush proposed in a climate change speech on Wednesday that the United States should halt its growth of greenhouse gas emissions by 2025. “Today, I am announcing a new national goal: to stop the growth of U.S. greenhouse gas emissions by 2025,” he said at the White House, adding that power plant emissions should be slowed so they peak over the next 10 to 15 years and decline thereafter. However, Bush did not mention any mandatory cap on U.S. …