I think modernised nations will be able to produce that sort of massive energy, and are also less likely to be impacted by climate change related droughts/famin

I think modernised nations will be able to produce that sort of massive energy, and are also less likely to be impacted by climate change related droughts/famines in the first place. Unfortunately and unjustly it's the poor countries along the equator that are f*cked, and unless some crazy political restructuring happens these countries don't have a shot of updating their economies fast enough to desalinate their way out of oblivion.