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Soaring carbon emissions will amplify the risk of conflict, hunger, floods and mass migration this century, the UN’s expert panel said on Monday in a landmark report on the impact of climate change.Left unchecked, greenhouse gas emissions may cost trillions of dollars in damage to property and ecosystems, and in bills for shoring up climate defences, it said, adding the impact would increase with every additional degree that temperatures rise. “Increasing magnitudes of warming increase the likelihood of severe, pervasive, and irreversible impacts,” a summary said, in a stark message to policymakers. The report is the second chapter of the fifth assessment by the Intergovernmental Panel on Climate Change (IPCC), set up in 1988 to provide neutral, science-based guidance to Governments.