 A simple food chain consisting of sewage and other waste on which salt- and heat-resistant algae would feed that then fed brine shrimp that then could be utilized in aquaculture as a food source for larger fishes was developed.The idea was then expanded to larger scale manmade salt water tidal ponds in coastal deserts that could be utilized for aquaculture in controlled ponds and a tide-controlled food source for larger scale "fish ranching" that would come to the tidal wash on the coast to feed.Relatively formal conventional pilot projects supported through government programs in China, the Atacama Desert of Chile and the Sudan convinced Sato that the simple aquaculture concept was unlikely to reach those who need and could benefit from it most when administered through government agencies.