Question

Which of the following is a disadvantage of synthetic chemical pesticides?

sometimes kill organisms other than the ones they were used for
work fast
decrease food production
have little impact on mosquitoes

Answer 1

A. They sometimes kill organisms other than the ones they were used for. This often happens is pesticides are washed into rivers, they can kill fish and the birds that eat the fish.

Answer 2

The right answer is sometimes kill organisms other than the ones they were used for.

Before using a pesticide, we therefore study in the laboratory the behavior of the active substance in the different natural environments: soil, water, air, but also its impact on fauna and flora.

* risk of air pollution.

* Risk of water pollution: Pesticides are used to protect crops. They sometimes act at the root level or they are used to clean the soil. They come into contact with this compartment. We must therefore predict their behavior, that is to say the way they disperse and decompose, so as not to endanger wildlife or water resources.