http://www.guardian.co.uk/uk_news/story/0,,1886964,00.html

Extreme droughts will spread, warn forecasters

Nearly a third of the world's land surface may be at risk of extreme drought by the end of the century, wreaking havoc on farmland and water resources and leading to mass migrations of "environmental refugees", climate experts warned yesterday.
Predictions based on historical trends in rainfall and surface temperatures dating back to the 1950s reveal that regions blighted by moderate droughts are set to double by the end of the century..........

..........."What we're talking about here are trends that will push people over the edge in a matter of years. Of all the studies that have come out on climate change, this is the most terrifying piece of research I've seen," said Mr Simms. "Every year unsafe water and a lack of decent sanitation globally kills about 1.6 million children under the age of five.

"For humans the biggest problem is going to be a loss of climate predictability. The climate is going to become MORE CHAOTIC and that is going to have a huge impact on people who are planting crops. Even if the predictions were more moderate we'd be extremely concerned. This will lead to mass migrations of environmental refugees with people crossing national borders to escape drought,"..................