Question

Which of the following statements are correct?

1. Non-biodegradable pollutants can be naturally recycled over time.

2. Aluminium and DDT are examples of non-biodegradable pollutants.

3. Biodegradable pollutants always enhance environmental quality.

• A. 1 & 2
• B. 2 only
• C. 2 & 3
• D. All are correct

Answer 1

Answer:

B. 2 only

• Correct Answer: Option B) 2 only

• Non-biodegradable pollutants can be naturally recycled over time. This statement is false. The defining characteristic of non-biodegradable pollutants is that they CANNOT be broken down naturally by microorganisms and other decomposers. They persist in the environment for very long periods, often hundreds or thousands of years.

• Aluminum and DDT are examples of non-biodegradable pollutants. This statement is correct. Both aluminum and DDT (Dichlorodiphenyltrichloroethane) are classic examples of non-biodegradable pollutants. Aluminum can take 200-500 years to break down in the environment. DDT is a persistent organic pollutant that remains in the environment and can bioaccumulate in food chains for decades.

• Biodegradable pollutants always enhance environmental quality. This statement is false. Biodegradable pollutants, while they can be broken down by natural processes, do not enhance environmental quality. In fact, they can cause significant harm, especially when released in large quantities. For example, excessive organic waste (biodegradable) can lead to eutrophication in water bodies, depleting oxygen and killing aquatic life.