What is the use of biochar in farming? 1. Biochar can be used as a part of the growing medium in vertical farming. 2. When biochar is a part of the growing medium, it promotes the growth of nitrogen-fixing microorganisms. 3. When biochar is a part of the growing medium, it enables the growing medium to retain water for longer time. Which of the statements given above is/are correct?

Asked in UPSC IAS 2020 · Topic: Environment and Sustainable Development (Renewable Energy Sources and Sustainable Energy Solutions)

1. 1 and 2 only
2. 2 only
3. 1 and 3 only
4. 1, 2 and 3

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