claim: Over time, climate becomes a net problem : by the 2070s, the UN Climate Panel finds that global warming will likely cause damage equivalent to 0.2 per cent to 2 per cent of global GDP.
evidence: The 10th Emissions Gap Report issued by the United Nations Environment Programme ( UNEP ) predicts that if emissions continue to increase at the same rate as they have in 2010–2020, global temperatures would rise by as much as 4° by 2100.