7.5 Billion people and growing are all living off the food grown in the industrial nations around the world. Naturally water evaporates during the day and creates clouds that then travel over land and rain water down on the landscape. The water then seeps down to natural reservoir called aquifers. Farmers dig wells that tap into these reservoirs and use the water to farm the land. The video describes what is going on in multiple countries as people continually pump the water from these aquifers.