Question

The presence of DDT in estuaries even after its ban in 1972 could be due to various factors. DDT is known to persist in the environment for a long time. It can accumulate in sediment and water bodies, and it may continue to leach into estuaries from sources like old contaminated sediments or runoff from previously treated areas. Additionally, DDT and its breakdown products can bioaccumulate in organisms within the estuaries, which can be a source of ongoing exposure.

Answer 1

DDT can still be found in estuaries due to its persistent nature and ability to accumulate in sediment and water. It can enter estuaries through old contaminated sediments or runoff from previously treated areas. The bioaccumulation of DDT in organisms within estuaries also contributes to its ongoing presence.

Step-by-step explanation:

The presence of DDT in estuaries even after its ban in 1972 can be attributed to several factors. DDT is known to persist in the environment for a long time, accumulating in sediment and water bodies. It can continue to leach into estuaries from old contaminated sediments or runoff from previously treated areas. Additionally, DDT and its breakdown products can bioaccumulate in organisms within estuaries, leading to ongoing exposure.