A farmer was using pesticides on his farm. He used the produce of his farm as food for rearing fishes, He was told that fishes were not fit for human consumption because large amount of pesticides had accumulated in the tissues of fishes. Explain how did this happen ?

Explanation

The pesticides travelled from the soil into the crops produced by the farmer. From the crops, used as food for fish, the pesticides entered into water from where they finally entered into the bodies of the fishes. Therefore, the fishes were not fit for human consumption.