What is an undesirable change in physical, chemical, or biological characteristics of air, land, water, or soil due to the introduction of contaminants called?

Q. What is an undesirable change in physical, chemical, or biological characteristics of air, land, water, or soil due to the introduction of contaminants called?

  1. Succession
  2. Pollution
  3. Conservation
  4. Extinction

Answer: Pollution

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