Which of the following are some important pollutants released by the steel industry in India? 1. Oxides of sulphur 2. Oxides of nitrogen 3. Carbon monoxide 4. Carbon dioxide Select the correct answer using the code given below.
Explanation
Statement 1 is Correct: The steel industry uses coal and coke as fuel and reducing agents; since these contain sulphur, their combustion and the sintering process release oxides of sulphur (SOx). Statement 2 is Correct: High-temperature operations in blast furnaces and heating processes cause atmospheric nitrogen to react with oxygen, leading to the formation of oxides of nitrogen (NOx). Statement 3 is Correct: Carbon monoxide (CO) is generated as a byproduct during the reduction of iron ore in the blast furnace and through the incomplete combustion of carbon-based fuels. Statement 4 is Correct: Carbon dioxide (CO2) is a major emission resulting from the chemical reduction of iron ore (coke reacting with ore) and the combustion of fossil fuels for energy production.