UPSC CSE Prelims 2011 Q7 — Science & Technology PYQ with Answer

Microbial fuel cells are considered a source of sustainable energy. Why?

1. They use living organisms as catalysts to generate electricity from certain substrates.

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 of the statements given above is/are correct?