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 sub-strates.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?

World energy resources are the estimated maximum capacity for energy production given all available resources on Earth. They can be divided by type into fossil fuel, nuclear fuel and renewable resources.

Fact: The world got 15.7% of its energy from low-carbon sources – either nuclear or renewables – in 2019.