Given below are two statements. In the light of the above statements, choose the most appropriate answer from the options given below.
Statement I:The AQI is used to report to the public an overall assessment of a given day's air quality.
Statement II:The AQI integrates air quality data for any two of the criteria pollutants into a single number.
ABoth Statement I and Statement II are correct
BBoth Statement I and Statement II are incorrect
CStatement I is correct but Statement II is incorrect ✓ Correct
DStatement I is incorrect but Statement II is correct
Correct answer: (C) Statement I is correct but Statement II is incorrect
Explanation
The air quality index does give the public a single overall reading of a given day's air quality.
Statement 1 correctly describes this reporting purpose.
Statement 2 is wrong because the index does not combine any two pollutants into one number.
Instead it computes a sub-index for each criteria pollutant and reports the worst one as the day's value.
The first statement holds while the second misdescribes the method.
Criteria pollutants tracked include particulates, ozone, carbon monoxide, sulphur dioxide and nitrogen dioxide.
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