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Although curiosity may have attracted many to their shows , they left behind a trail of converts not just to their own talents , but also to the style they perform so well . And with few options to import food given the stringency of the U.S. embargo , Cuba turned over a new leaf by converting almost entirely to an organic production system within 10 years . This calls for converting not only economic but also cultural and educational goods and services into commodities salable in the market for profit , and therefore producing such of them which have demand from those consumers who have the most purchasing power . Mr. Donahue started with the mission of converting not only the fuel propulsion and electric generators to biodiesel , but also the oils used for power transmission , lubricants , and crankcase motors .