A thought on how to recycle rain to end the drought in Cuba.
Paper mills. Help Cuba build plenty of them. The plants would produce dimethyl sulfide which has been proven to cause significant cloud formation when released by algae. The clouds would provide rain, which would increase crops, which would provide a stream of revenue for buying raw materials, which could be used in the mills to create dimethyl sulfide and more clouds (the paper would be worth a little money too).