Reuters: The Group of Eight industrial nations should set shorter-term goals for axing greenhouse gases than 2050 to help guide billions of dollars of investment, the top U.N. climate change official said. Yvo de Boer, head of the U.N. Climate Change Secretariat, also told Reuters that a policy outlined by President George W. Bush last month that would cap U.S. emissions in 2025 was “not enough” to confront global warming. “We are at a stage where we really need to see …