Air pollution
Q. Which of the following is/are correct?
1) Ten out of the top 20 globally air polluted cities are from India.
2) Gwalior ranks second for fine particulate matter (PM 2.5).- Published on 20 May 16a. Only 1
b. Only 2
c. Both 1 and 2
d. Neither 1 nor 2
ANSWER: Both 1 and 2
- The ‘Global Urban Ambient Air Pollution Database (update 2016)’ released by WHO used data from government and research organisations to prepare the database. It is based on ground measurements of annual mean concentrations of particulate matter (PM 10 and PM 2.5).
- Gwalior and Allahabad, meanwhile, come a close second and third in terms of PM 2.5, while Patna and Raipur are ranked 6th and 7th.
- Delhi now stands 11th among 3,000 cities in 103 countries in terms of fine particulate matter or PM 2.5. Delhi is 25th based on bigger particulate or PM 10 levels.
- Particulate matter affects everyone but causes harm faster to children and senior citizens.
