Q. Which among the following is most polluting industry among the four?
Answer: Cement
Notes: Among the four industries listed, the most polluting industry is often considered to be the Cement industry (Option A). Cement production is energy-intensive and involves the release of greenhouse gases, particularly carbon dioxide (CO2), during the clinker production process. Additionally, it generates dust and emissions of various pollutants, making it a significant contributor to air pollution and carbon emissions. While the other industries listed may also have environmental impacts, such as the release of chemicals in Synthetic Rubber production or waste generation in Food Processing and Stone Crushing, the scale and environmental consequences of cement production are generally considered to be more substantial in terms of pollution.