Meanwhile, a new report from the Government Accountability Office finds climate change is already costing U.S. taxpayers billions of dollars per year, with costs expected to skyrocket over the coming years. The GAO report found taxpayers paid out more than $350 billion over the last decade on flood and crop insurance along with disaster assistance programs. That figure is before factoring in the massive costs of this year’s three major hurricanes and devastating wildfires in western states.