What is the environmental concern with organochlorine insecticides?

• A. Highly lipid-soluble and persist in env favoring bioaccumulation upward in food chains
• B. Highly water-soluble and persist brief period
• C. Non-persistent and non-bioaccumulative
• D. Degrades rapidly with no environmental impact

Answer: (A)

Organoclorine insecticides are classic examples of persistent, lipophilic contaminants. Their chemical structure makes them highly soluble in fats rather than water, so they readily accumulate in the fatty tissues of organisms and tend to partition into sediments. They resist natural degradation processes and persist in the environment for long periods. Because they stay in the body and in the environment, concentrations build up as organisms accumulate them (bioaccumulation) and become even higher as predators eat prey (biomagnification up the food chain). This combination of persistence and lipid solubility explains the widespread environmental concerns, including effects on wildlife and ecosystems. The other descriptions—being highly water-soluble and short-lived, or non-persistent and non-bioaccumulative, or degrading rapidly with no impact—don’t match the real properties and risks of organochlorines.