Reuters: The U.N. climate panel should only make predictions when it has solid evidence and should avoid policy advocacy, scientists said in a report on Monday that called for thorough reform of the body. The U.N. Intergovernmental Panel on Climate Change (IPCC) was widely criticized after admitting its 2007 global warming report wrongly said Himalayan glaciers would vanish by 2035 and that it had overstated how much of the Netherlands is below sea level. Such firm forecasts should be …