I am amused by the optimism of these responses. Nobody is concerned that if we end up with cheap nuclear fusion that humanity won’t use a lot more of it? Would humans stop building resorts in deserts?
Deserts are a wonderful place for resorts, assuming it is man made desert (like the Sahara) and infinite energy to desalinate and recycle water in an ecologically sound way.
I am completely a proponent of humanity using cheap energy to elevate our standard of living to ridiculous levels. I’m just wondering what we will do with the waste heat. I cannot believe that we will limit ourselves to current levels of consumption.
We do know that the climate of the Sahara differed and it was grasslands in portions for a time.
But it wasn't farmed (your own article notes that the seeds found were wild), and the processes which re-asserted the pre-existing desert landscape were not human-induced.