Independent: Climate change poses a major risk to forests all over the world, threatening widespread tree deaths that could wipe out wildlife, exacerbate global warming and hurt the economy, a major new UN report will warn today. According to a leaked final draft of the latest UN Intergovernmental Panel on Climate Change (IPCC) report, tree mortality and associated forest dieback will become apparent in many regions sooner than previously anticipated. Forest dieback is a major environmental risk with potentially...