Q30 Consider the following:
i) Carbon dioxide.
ii) Oxides of nitrogen.
iii) Oxides of Sulphur
Which of the above is/are the emissions from coal combustion at thermal power plants?
30 Ans D
Explanation:
• Coal fired thermal power plants are one of the main contributors for atmospheric pollution and green-house gases. Emissions that come from these plants could be categorized into three different categories:
• Gaseous emissions Carbon Dioxide, Carbon Monoxide, Sulphur Dioxide and Nitrogen Dioxide which lead to global warming and acid rain.
• Particulate emissions - this fine dust that is emanated from the stacks of power plants is a health hazard.
• Trace elements like Mercury, Cadmium and Lead which are also health hazards.
• These emissions are formed due to the Combustion process when coal is burned to produce heat. Some are avoidable, some can be controlled or reduced, and some cannot be avoided