Which pollutant category includes pollutants that persist and bioaccumulate in tissues?

Which pollutant category includes pollutants that persist and bioaccumulate in tissues?

• A. Physical pollution
• B. Chemical pollution
• C. Biological pollution
• D. Thermal pollution

Answer: (B)

Pollutants that persist in the environment and build up in the tissues of organisms are chemical pollutants. This happens because many chemicals are resistant to natural degradation and tend to dissolve in fats, so they accumulate in fatty tissues. As predators eat prey, the chemical becomes more concentrated at higher trophic levels—a process called bioaccumulation and sometimes magnification up the food chain. This combination of persistence and tissue accumulation is a hallmark of chemical pollutants, often referred to as persistent organic pollutants. Physical pollution involves nonchemical stuff like plastics or sediments; it may persist but doesn’t inherently rely on chemical properties to bioaccumulate in tissues. Thermal pollution deals with changes in temperature from industrial discharges and isn’t about chemical persistence or tissue accumulation. Biological pollution relates to living organisms or biological contaminants. So, the category that captures pollutants that persist and bioaccumulate is chemical pollution.

Pollutants that persist in the environment and build up in the tissues of organisms are chemical pollutants. This happens because many chemicals are resistant to natural degradation and tend to dissolve in fats, so they accumulate in fatty tissues. As predators eat prey, the chemical becomes more concentrated at higher trophic levels—a process called bioaccumulation and sometimes magnification up the food chain. This combination of persistence and tissue accumulation is a hallmark of chemical pollutants, often referred to as persistent organic pollutants.

Physical pollution involves nonchemical stuff like plastics or sediments; it may persist but doesn’t inherently rely on chemical properties to bioaccumulate in tissues. Thermal pollution deals with changes in temperature from industrial discharges and isn’t about chemical persistence or tissue accumulation. Biological pollution relates to living organisms or biological contaminants. So, the category that captures pollutants that persist and bioaccumulate is chemical pollution.