Unarable desert to grow from 8% to 40% of earth's surface this century

This study of global warming is pretty scary:

Drought threatening the lives of millions will spread across half the land surface of the Earth in the coming century because of global warming, according to new predictions from Britain's leading climate scientists.

Extreme drought, in which agriculture is in effect impossible, will affect about a third of the planet, according to the study from the Met Office's Hadley Centre for Climate Prediction and Research.

It is one of the most dire forecasts so far of the potential effects of rising temperatures around the world - yet it may be an underestimation, the scientists involved said yesterday.

... The study, by Eleanor Burke and two Hadley Centre colleagues, models how a measure of drought known as the Palmer Drought Severity Index (PDSI) is likely to increase globally during the coming century with predicted changes in rainfall and heat around the world because of climate change. It shows the PDSI figure for moderate drought, currently at 25 per cent of the Earth's surface, rising to 50 per cent by 2100, the figure for severe drought, currently at about 8 per cent, rising to 40 cent, and the figure for extreme drought, currently 3 per cent, rising to 30 per cent.

Of course, our government is planning a massive effort to reverse this problem, and with all the king's horses and all the king's men, we'll be able to put the earth back together again. Oh, sorry, I was pretending Al Gore won in 2000 -- well, actually, he did, but I was pretending he took office.