6 November 2019, The Conversation. Australia could fall apart under climate change. But there’s a way to avoid it. Professor Ross Garnaut: Four years ago in December 2015, every member of the United Nations met in Paris and agreed to hold global temperature increases to 2°C, and as close as possible to 1.5°C. The bad news is that four years on the best that we can hope for is holding global increases to around 1.75°C. We can only do that if the world moves decisively towards zero net emissions by the middle of the century. A failure to act here, accompanied by similar paralysis in other countries, would see our grandchildren living with temperature increases of around 4°C this century, and more beyond. I have spent my life on the positive end of discussion of Australian domestic and international policy questions. But if effective global action on climate change fails, I fear the challenge would be beyond contemporary Australia. I fear that things would fall apart. There is reason to hope. It’s not all bad news. What we know today about the effect of increased concentrations of greenhouse gases broadly confirms the conclusions I drew from available research in previous climate change reviews in 2008 and 2011. I conducted these for, respectively, state and Commonwealth governments, and a federal cross-parliamentary committee. But these reviews greatly overestimated the cost of meeting ambitious reduction targets.