Climate Central: The American Southwest, which is already the hottest and driest region of the nation, is likely to become even hotter and drier in the next few decades thanks in part to the ongoing effects of human-generated greenhouse gases. That's the verdict of the draft National Climate Assessment report, the product of a federal advisory committee charged with assessing how climate change has already affected the U.S., and what the future holds.
Projected changes in average temperature (°F) from observed...