What environmental issue is associated with traditional cement production?

• A. Water pollution from runoff.
• B. Nutrient depletion in soils.
• C. Soil erosion.
• D. High carbon emissions.

Answer: (D)

The main environmental issue tied to traditional cement production is high carbon emissions. This happens because making cement involves calcining limestone (calcium carbonate) into lime (calcium oxide), which releases CO2 directly, and because the process requires large amounts of heat from burning fossil fuels. Because of these two sources, cement production is a major contributor to greenhouse gas emissions, making carbon footprint the most significant environmental concern. Water pollution, soil nutrient depletion, or soil erosion can occur in broader construction activities, but they are not the defining problem of the cement manufacturing process itself. This is why high carbon emissions best describe the environmental impact here.