The conventional view in policy circles is that climate change will cost the U.S. somewhere between 0 and 2 percent of GDP by the year 2100. But a more thorough accounting points to a much heavier price.
Officials in Copenhagen will probably ink a new agreement calling for reductions in global CO2 emissions. But even if the delegates achieve this outcome, it is likely that there will be little to cheer.
The United Nations Climate Change Conference in Copenhagen is a moment that challenges us and history. The global warming crisis requires robust, concerted and conscientious responses from all governments.