Which of the following is NOT an example of bioremediation?

using bacteria to make antibiotics and vitamins

using bacteria to break down the organic matter in sewage sludge

using bacteria to clean up oil spills

using bacteria to remove toxic substances from old mining sites

Using bacteria to make antibiotics and vitamins is not an example of bioremediation.

Explanation:

Bioremediation branches from biotechnology where either genetically engineered or naturally existing microbes are used to clean up pollutants and contaminating materials from the environment.

These microorganisms digest contaminants by secreting enzymes that breaks them down into smaller pieces, which they use as their energy or food source for growth, further cleaning the environment, groundwater and oil spills.