Climate News Network: China is protecting itself against future food supply problems caused by climate change by buying or leasing large tracts of land in Africa and South America, a leading UK climate scientist says. Professor Peter Wadhams, an expert on the disappearing Arctic ice, says that while countries in North America and Europe are ignoring the threat that changing weather patterns are causing to the world food supply, China is taking self-protective action. He says that changes in the jet stream caused by...