美国对用玉米为原料制备的乙醇提供补贴，而却对以糖为原料的乙醇征收关税，被这一税则掩盖的是对石油和天然气工业的巨额补贴。
The US subsidizes corn-based ethanol, and imposes tariffs on sugar-based ethanol; hidden in the tax code are billions of dollars of subsidies to the oil and gas industries.