Fertilizers are very useful for the humans to increase in crop production and to fertile the land. Many of the fertilizers like DDT are causing many environmental degradation. this can cause much harm to the living life.many pollutions  takes place and it can also can cause soil erosion. so it is advisable to use eco friendly fertilisers to avoid such problems.
   Science and technology is developing day by day and it helps to increase the yield as well as our problems.
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anyway akka u helped in my science activity thnxxx
can we be friends?
okay dear