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Due to its ethanol fuel production, Brazil has sometimes been described as a bio-energy superpower. Ethanol fuel is produced from sugar cane. Brazil has the largest sugar cane crop in the world, and is the largest exporter of ethanol in the world. With the 1973 oil crisis, the Brazilian government initiated in 1975 the Pró-Álcool program. The Pró-Álcool or "Programa Nacional do Álcool" (National Alcohol Program) was a nationwide program financed by the government to phase out all automobile fuels derived from fossil fuels in favour of ethanol. The program successfully reduced by 10 million the number of cars running on gasoline in Brazil, thereby reducing the country's dependence on oil imports.