This is a movie about Cuba's urban gardens, they are living in a post Peak Oil world since 1990 and doing good. When the Soviet Union disappeared and they no longer got their shipments of oil and artificial fertilizers, they had to do without , no more large scale mechanized farming - a good thing for their environment
I can say they are 50 years ahead of the rest of the world, and one day they will thank Castro for not letting them be "capitalists" like the people in Haiti who eat dirt, while foreign companies grow crops for ethanol for export
They are lucky with their tropical climate that allows food to be grown all year.
What I like most is that artist who paints the food grown in the gardens and the fish from the ocean, it shows the link between man and nature, like those ancient people that painted the animals they hunted