1.

What threats to nature do chemical fertilizers, pesticides, insecticides and herbi-cides pose?

Answer»
  • When we use insecticides to kill pests or weedicides/herbicides to destroy weeds, a large percentages of herbicides, chemical fertilizers, pesticides, insecticides remain in the soil. 
  • From the soil, these chemicals find their way into water sources. 
  • People spray these chemicals in fields are exposed to them and some of the chemicals enter their body. 
  • Insecticides destroy all insects in which some of them are useful in pollination. 
  • Extensive use of chemical fertilizers, pesticides, herbicides and weedicides makes the soil unsuitable to grow crops after sometime.


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