1
Consider the following statements:
1. Coal ash contains arsenic, lead and mercury.
2. Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the
environment.
3. High ash content is observed in Indian coal.
Which of the statements given above is/are correct?
2
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 nitrogenfixing 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?
3
In rural road construction, the use of which of the following is preferred for ensuring
environmental sustainability or to reduce carbon footprint?
1. Copper slag
2. Cold mix asphalt technology
3. Geotextiles
4. Hot mix asphalt technology
5. Portland cement
Select the correct answer using the code given below
4
Which one of the following statements best describes the term �Social Cost of Carbon�?
It is a measure, in monetary value, of the
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