More than 500 million people today live in areas affected by erosion linked to climate change, the Intergovernmental Panel on Climate Change IPCC warned on Thursday, before urging all countries to commit to sustainable land use to help limit greenhouse gas emissions before it is too late. "Humans affect more than 70 per cent of ice-free land and a quarter is already degraded" -- Valérie Masson-Delmotte, Co-Chair of one of three Working Groups that contributed to the 1,200-page report. More: http