Sulphur dioxide SO2 emissions are a significant contributor to air pollution which of the following ...........

Environment and Ecology Air Pollution

Sulphur dioxide (SO₂) emissions are a significant contributor to air pollution, which of the following statements in this context is incorrect?

Sulphur dioxide (SO₂) emitted by the burning of fossil fuels — coal, oil, and diesel — or other materials that contain sulfur.

Sulphur dioxide (SO₂) is not measured under National Air Quality Index (AQI).

Sulphur dioxide (SO₂) isalso a natural byproduct of volcanic activity.

Secondary pollutants formed with Sulphur dioxide (SO₂) include sulfate aerosols, particulate matter, and acid rain.

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Explanation:

Sulfur dioxide (SO2), a colorless, bad-smelling, toxic gas, is part of a larger group of chemicals referred to as sulfur oxides (SOx). These gases, especially SO2, are emitted by the burning of fossil fuels — coal, oil, and diesel — or other materials that contain sulfur. Sources include power plants, metals processing and smelting facilities, and vehicles.

Sulfur dioxide is also a natural byproduct of volcanic activity. Like nitrogen dioxide, sulfur dioxide can create secondary pollutants once released into the air. Secondary pollutants formed with sulfur dioxide include sulfate aerosols, particulate matter, and acid rain.

National Air Quality Index (AQI) has been launched in October 2014 to disseminate information on air quality in an easily understandable form for the general public. The measurement of air quality is based on eight pollutants, namely, PM₁₀, PM_2.5, NO₂, SO₂, CO, O₃, NH₃, and Pb for which short-term (up to 24-hourly averaging period) National Ambient Air Quality Standards are prescribed and the worst reading in these pollutants represents the AQI for that city.