A new study released this week indicates that the American South will feel the worst economic effects of a warming climate.  Articles in The Atlantic here and in the New York Times here describe the results of the study published today in Science which use a new economic method of calculating economic costs by calculating the costs for individual counties and adding them up rather than doing a regional study and downscaling them.  The maps in the study show that economic damage to many parts of the Southeast may reach as much as 20% decrease in Gross Domestic Product (GDP) by late in the century, while some other areas of the US, particularly in northern states, may see up to 10% increase in GDP. A companion map shows that yields will decrease in many parts of the Southeast although there are some areas where they are expected to go up.