But detractors say those numbers are the product of economic models that are not fit to capture the full extent of climate damage. A year earlier, the Trump administration cited similar models to justify replacing the Obama-era Clean Power Plan with one allowing higher emissions from coal-burning plants. At issue are the "integrated assessment models" (IAMs) economists use to draw conclusions on anything from output losses to financial risk or the pricing of carbon markets. Line chart with data from Climate Tracker shows varying predictions of global warming damage as percentage of GDP. "Our main message is: 'Economists, speak to climate scientists and come up with results that make sense'," he said.

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Persons: William Nordhaus, Trump, Obama, Isabel Schnabel, Leon Walras, doesn't, Thierry Philipponnat, Steve Keen, Nordhaus, Rupert Thorne, Livio Stracca, Jean Boissinot, Nicholas Stern, Stern, Watch's Philipponnat, Mark John, Barbara Lewis Organizations: Central Bank, Finance Watch, Reuters, Network, Greening, " University College of London, ECB, NGFS, LSE, Grantham Research Institute, European Union, Thomson Locations: Dubai, Paris, Brussels