For years, Saudi Arabia’s planned Trojena ski resort occupied a strange place in the ski world. It was simultaneously one of the most ambitious ski projects ever conceived and one of the most improbable: a resort being carved into the mountains of an arid country where natural snow is so scarce that researchers from Copernicus estimate the area receives snow cover for less than two days per year on average. The same researchers concluded that at most 60 days of skiing would be…