Assertion: Suspended particulate matter (SPM) is an important pollutant released by diesel vehicles.
Reason: Catalytic converters greatly reduce pollution caused by automobiles.
Reason: Catalytic converters greatly reduce pollution caused by automobiles.
Answer & explanation
Correct answer: option 2
Studies have shown that high SPM concentrations in the air can have a detrimental impact on respiratory organs. SPM generation from natural sources (e.g., volcanoes or dust storms) and human activities (vehicles, incinerators and industrial plants). Catalytic converters is a devices designed to reduce the amount of emissions from automobiles. The current (so-called threeway) systems use a heated metal catalyst to reduce the emissions of carbon monoxide (CO), hydrocarbons, and nitric oxide (NO), all of which contribute to the formation of photochemical smog.