DDT is insoluble in water but soluble in fats. Due to low efficient transfer of energy from one trophic level to other, herbivores eat more DDT-polluted vegetables. Similarly, carnivores eat many herbivores. A predator stores much quantity of DDT with its prey continuously. This process continues for several years by which a significant concentration of DDT accumulates in top carnivores. DDT causes thinning of eggshells and their premature breaking, eventually causing decline in bird populations.
