9th Class Science Improvement in food resources Question Bank 9th CBSE Science Improvement in food resources

  • question_answer
      Why should pesticides be used judiciously?

    Answer:

                      Pesticides are the chemicals that are used to control weeds, insects, rodents, fungi as well as diseases of plants. Their excessive use causes environmental pollution. They reach the water resources and affect the aquatic flora and fauna. These harmful chemicals reach the bodies of birds, animals and human beings through the various food chains and are thus, harmful to all depending on their concentration in the body.


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