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In a certain study conducted on occurrence of DDT along food chains in an ecosystem, the concentration of DDT in grass was found to be

In a certain study conducted on occurrence of DDT along food chains in an ecosystem, the concentration of DDT in grass was found to be 0.5 ppm (parts per million), in sheep it was 2ppm and in man it was 10 ppm. Why was the concentration of DDT maximum in case of man?

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