We as a people have built large pipes to transports huge volume of crud oil over long distances across the globe. Is it so difficult to do the same with water? Why haven't we done the same to transport water from ocean, sea, lake, rivers etc... to deserts all across the world where it is much needed?.
This can help increase the rate of desert greening, re-afforestation and help in the whole lots of other global related problems.
Thoughts>>>
And besides sahara is once a ocean as you can see all are sand meaning in past it is some kind of body of water also this is according to my views but i may be mistaken also.
But dont bother making this a problem because.people there survived even before we are born.