Problem 3: Elusive social benefits Oddly enough, despite its questionable net energy value and CO2 reduction efficiency, corn alcohol is receiving official encouragement and massive subsidies.
爭議 3：社會效益難實現弔詭的是，能源淨值和 CO2 減量效益備受爭議的玉米酒精，卻受到政策的鼓勵，大獲補貼。