Water Pollution · NCERT Biology

Thermal wastewater discharge into water bodies primarily affects the ecosystem by:

  1. Increasing the nutrient content of the water
  2. Decreasing the BOD of the water
  3. Lowering dissolved oxygen and harming cold-water organisms
  4. Promoting the growth of indigenous aquatic species
Show answer and explanation

Correct answer: Lowering dissolved oxygen and harming cold-water organisms

Heated effluents from power plants raise the water temperature, which reduces the solubility of oxygen. This thermal pollution can eliminate organisms sensitive to high temperatures and disrupt the natural biological balance.

Difficulty: Medium Question 10 of 20

Practice all 20 Water Pollution questions

Keep practicing

More Water Pollution questions