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I just looked this up. Took about 10 seconds: Seen from space, the majority of the Earth’s surface is covered by oceans – that makes up 71% of the surface of the Earth, with the remaining 29% for land. But what percentage of the Earth’s land surface is desert? Deserts actually make up 33%, or 1/3rd of the land’s surface area.

And the idiot researcher say’s that because of climate change up to 30% of earth could become desert?

ckilmer *

saleman: "Deserts actually make up 33%, or 1/3rd of the land’s surface area.
And the idiot researcher say’s that because of climate change up to 30% of earth could become desert?"

Right, and they want to spend $trillions & $trillions transferring wealth to poorer countries as reparations for alleged AGW (anthropogenic global warming).

But consider alternatives:

The world's largest desalination plant in Saudi Arabia cost roughly $7 billion to build and produces enough fresh water to fill two 10 foot pipelines each transmitting water at the rate of 1,500 gallons per second, roughly enough for 3 million modern homes.
Add some $billions for nuclear power and long distance transmission pipes, and assume half the water is used for crop irrigation, then $10 billion provides enough desalinated water for over a million people in the driest places on earth.

Today there are roughly 20,000 desalination plants world-wide each producing on average just 15 gallons per second but serving 300 million people in total.
So 100 of the largest scale plants would cost around $1 trillion and add another 500 million people being serviced.

Sure $1 trillion is a lot of money, but it would go for something tangible and permanent, something which could be privately-financed and profit-making.

Which is why, of course, the social redistributionists who rule the world will never let it happen.

*thought you might enjoy this. ;-)