Even though in science there are several varying definitions of deserts, a common simple definition is that they aredry regions of arid land with little or no precipitation, flora, and fauna and only a few people inhabiting it– if at all. About 35% of the earth's continental surface are per definition deserts, covering more than 33. Our planet is witnessing the increasing challenge of desertification, triggered by climate change, human modernization and lifestyle changes, and – to a much lesser degree – purely natural processes. Desertification leaves less. Notwithstanding the enormous promises deserts may hold for solar PV, their general potential is on the other hand limited by quite significant constraints and problems. Let's have a look at the top 10 challenges: 1. Extreme.