The idea of using otherwise barren areas for fuel production is a good one and though more difficult than growing crops on fertile ground, I think this is an area that will soon have to be expanded.
I see no reason why algae can't be grown in artificial ponds on otherwise barren ground. Sure fresh water is an issue, but with some electricity we can make salt water fresh enough for the job. Now, we have salt water, the sun and solar technology...let me see if I can join the dots together...
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