The Sahara Desert, from what little I gathered from Wikipedia, is a diverse and large desert, about the size of the United States and all of Europe. What we see is large sand dunes that stretch as far as the eye can see.
Given the tremendous amount of heat, sun, and wind with a sparse population, it would appear to be an opportunity for renewable energy investments. It would benefit a whole region as well as drastically reduce reliance on petroleum.
I know there are a lot of politics and conflicts that are regional as well as international in scope. However, there is a saying that goes along the line of if something isn't hard, it's not worth doing. Or something close to it.
A multibillion dollar effort can go a long way in help energy starved nations while also benefitting the local populations. Of course, we should not make the same mistakes that many companies and conquering armies from first world nations often do.
This an endeavor should be one undertaken with the ultimate goal of helping all of humanity.