As a hypothetical, say it became easy to grab water from objects in space and then move it places that needed (Africa / the gulf). What would the end results be for the global climate over time? Would you just end up with a flooded earth? Would temperatures rise or fall as time goes on?
For starters even if we could do that, I doubt the water would go to places that actually need it. Heck it’s not like we don’t have enough on Earth already, we already very much COULD supply poor African countries with the water and food they need, we just don’t.
If we could drag resources from outer space, only the countries that are already rich would benefit.