four feedstocks—sugarcane, corn, cassava and sweet sorghum—were initially identified for ethanol production, but sugarcane is expected to be the predominant source of ethanol. the philippines is a sugar-producing country, and sugarcane is grown mainly in the islands of negros, luzon, panay and mindanao. despite growing demand for sugar, there are still an estimated 90,750 hectares (224,000 acres) of sugarcane available that can be used for ethanol production, and high-yielding varieties of sugarcane are available.