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随着环境保护意识的日益增强,一些国家正在淘汰对环境污染严重的化学农药,越来越多地使用生物农药,世界农药正在发生深刻的变化。 据联合国粮农组织估计,为了对付作物病虫害,全世界每年要生产200万吨农药,其中主要是化学农药。化学农药带来许多问题;①人畜中毒,一方面是在施药过程中中毒,另一方面是人们食用使用化学农药的粮食、蔬菜、水果形成中毒。全世界每年约有200万人农药中毒,其中大约有4万人死亡。②使害虫产生了抗药性。普遍出现了农药越用越多,使
With the increasing awareness of environmental protection, some countries are phasing out chemical pesticides that are seriously polluting the environment and increasingly use biological pesticides. The world’s pesticides are undergoing profound changes. The UN Food and Agriculture Organization estimates that in order to deal with crop pests and diseases, the world produces 2 million tons of pesticides per year, mainly chemical pesticides. Chemical pesticides cause many problems; ① human and animal poisoning, on the one hand, is poisoned in the process of pesticide application; on the other hand, people eat food, vegetables and fruits poisoned by using chemical pesticides. About 2 million pesticide poisonings occur each year in the world, of which about 40,000 are dead. ② pests have a resistance. The more common use of pesticides, the more