Environment & Ecology · Air Pollution
With reference to particulate matter PM 2.5 and PM 10, consider the following statements: 1. PM 2.5 is more harmful than PM 10 because it can penetrate deep into the lungs and even enter the bloodstream. 2. PM 10 mainly affects the upper respiratory tract and can be partially filtered by the nasal passages. 3. SAFAR (System of Air Quality and Weather Forecasting and Research) exclusively monitors PM 2.5 pollution and ignores PM 10. 4. PM 2.5 is primarily generated from natural sources like dust storms, while PM 10 comes mainly from combustion-related sources. How many of the above statements are correct?
- 1All four
- 2Only three
- 3Only two✓
- 4Only one
Correct answer
Only two
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