Which of the following is a major environmental concern associated with Blast Furnace Gas (BFG)?
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A.
Release of particulate matter
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B.
High sulphur dioxide emissions
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C.
Generation of methane
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D.
Emission of carbon dioxide
Correct Answer:
D. Emission of carbon dioxide
Explanation:
Blast furnace gas (BFG) is a byproduct of the iron-making process, primarily composed of nitrogen, carbon monoxide, and carbon dioxide. While it is often recovered and reused as a fuel source to improve energy efficiency, its high concentration of carbon dioxide (CO2) makes it a significant environmental concern. Global steel production, particularly through the coal-based blast furnace route, is responsible for approximately 7% to 11% of total global greenhouse gas emissions. Because BFG is generated during the reduction of iron ore with coke, it inherently carries a high carbon footprint, contributing directly to global warming and climate change. Although other pollutants like particulate matter and sulfur dioxide are also associated with steel manufacturing, the massive scale of CO2 emissions from blast furnaces represents the most critical long-term environmental challenge for the industry.
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