Which of the following are some important pollutants released by the steel industry in India?1. Oxides of sulphur2. Oxide of nitrogen3. Carbon monoxide4. Carbon dioxideSelect the correct answer using the code given below.
✓ Correct answer: d) 1, 2, 3 and 4
ExplanationIndia is second largest crude steel producer in the world.The steel industry is highly resource and energy-inten- sive, as well as significantly polluting.For instance, India’s cur- rent average emission intensity is 2.55 tonnes of CO2 per tonne of crude steel, while the global average is around 1.95 tonnes.Emissions from the steel sector have decreased by 15% from 2005 to 2022, and the government aims for an additional 10% reduction by 2030. The major environmental impacts of integrated steel mills are from coking and iron-making.Coke production is one of the major pollution sources from steel production.Air emissions such as coke oven gas, naphthalene, ammonium compounds, crude light oil, sulfur and coke dust are released from coke ov- ens.Steel production has a number of impacts on the environment, including air emissions (CO2, CO SOx, NOx, PM2.5), wastewater contaminants, hazardous wastes, and solid wastes.88
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