C degraph UN climate change report to warn of severe, pervasive' effects of global warming Flooding, dangerous heatwaves, ill health and violent conflicts among likely risks if the world keeps burning fossil fuels at current rates, IPCC expected to say Worming beyond 4C would likely result in "substantial species extinction, large risks to global and regional food security, impacts on normal human activities", according to o draft of the document. By Emily Gosden: 01 Nov 2014 The world is on course to experience "severe and pervasive" negative impacts from climate change unless it takes rapid action to slash its greenhouse gas emissions, a major UN report is expected to warn on Sunday. Flooding, dangerous heatwaves, ill health and violent conflicts are among the likely risks if temperatures exceed 2C above pre-industrial levels, the report from the Intergovernmental Panel on Climate Change will say. Wage of 3 EFTA01206690