为解决粮食和环境问题,科学、有效、合理的途径是   A.利用废弃

为解决粮食和环境问题,科学、有效、合理的途径是

  A.利用废弃的重金属矿区栽培饲料作物

  B.利用小麦、玉米生产的酒精来替代石油作燃料

  C.把沼泽地改造成农田,种植多种农作物

  D.培育具有高光合效率的农作物新品种

答案

D


解析:

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