Microbial fuel cells are considered a source of substainable energy. Why?1. They use living organisms as catalysts to generate electricity from certain substracts.2. They use a variety of inorganic materials as substrates.3. They can be installed in waste water treatment plants to cleanse water and produce electricity. Which statements given above is/are correct?

A microorganism is defined as a living thing that is so small it must be viewed with a microscope. Some microorganisms like viruses are so small they can only be seen with special electron microscopes.