Seriously, I image a digger can dig one of those halve moons every few seconds or so if it is equiped with a custom shovel. And maybe sprinkle in some fertilizer to kickstart the growth.
That would be probably too fast and requires less manpower.
But manpower could be used for the consequent work needed to maintain that "wall".
Anything could help in the end, but they're ok like that now, apparently
Yeah the Atlantic and the Sahara are massively intertwined. I think that the other commentor is missing is that the expansion of the desert is actually negatively effecting the ocean now (ie the sunlight % drop from the sand haze)
I speak fluent english and the only thing that bothers me is his strange rythm but i think even a native can speak like that so idk whats the big problem with his english.
Western countries should look at this and learn from it. In this part of the world, rivers are canals, infrastructures are made to to flow water as quickly as possible to the sea or ocean. The water need to stay locally to recharge the underwater, to provide water to local communities, to feed people, etc.
We distroyed the environment and need to change that.