A.水體的富營(yíng)養(yǎng)化B.酸雨C.溫室效應(yīng)D.臭氧層破壞
A.作物品質(zhì)B.土壤肥力C.農(nóng)業(yè)病蟲(chóng)草害D.農(nóng)業(yè)氣象災(zāi)害E.畜牧業(yè)