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?
✓ Correct answer: d) 1, 2 and 3 Environment and Ecology 489
ExplanationStatement 1 is correct: Coal ash contains contaminants like mercury, cadmium and arsenic.Without proper manage- ment, these contaminants can pollute waterways, groundwater, drinking water, and the air.Statement 2 is correct: Burning of fossil fuels (which contain sulphur and nitrogenous matter) such as coal and oil in power stations and furnaces or petrol and diesel in motor engines pro- duce sulphur dioxide and nitrogen oxides, which also leads to ‘acid rain’.Statement 3 is correct: Indian Coal has comparatively higher ash content than imported coal due to the drift theory of the for- mation of coal deposits in India.Coal seams formed due to drift theory contain higher ash as compared to the in-situ theory of formation.77
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