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?

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UPSC Question: Consider the following statements: ...

Consider the following statements:

Coal ash contains arsenic, lead and mercury.
Coal-fired power plants release sulphur dioxide and oxides of nitrogen into the environment.
High ash content is observed in Indian coal. Which of the statements given above is/are correct?