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Sugarcane is a large, perennial, grass. It produces thick culms that may grow up to 2 - 3 meters tall, but with extended growing periods the plant can become much taller A major crop in the tropics, where it is grown mainly for the sap in the stems which is used for making sugar, alcohol for fuel etc. The plant is also a major source of biomass and a useful wax. It has been cultivated since ancient times