Environment & Ecology · Air Pollution & Guidelines
With reference to the World Health Organization Air Quality Guidelines, 2021, consider the following pollutants: I. Carbon monoxide II. Particulate matter (PM2.5) III. Lead IV. Sulphur dioxide V. Nitrogen dioxide VI. Ozone How many of the above are included with target level guidelines under the WHO Air Quality Guidelines (2021)?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Only four
- 2Only five✓
- 3All six
- 4Only three
Correct answer
Only five
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