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自从化学农药投入使用以来,人们十分注重防治效果,却很少注意对生态环境的影响。高残留农药的大量使用,对生态平衡及环境的影响日趋严重。化学性质稳定的六六
Since the chemical pesticides put into use, people pay great attention to prevention and control effects, but seldom pay attention to the impact on the ecological environment. The heavy use of high residual pesticides has an increasingly serious impact on ecological balance and the environment. Sixty-six chemical stability