Following is the list of Top 10 Most Populated Countries In The World:
| S.No. | Country | Population Level |
| 1 | Mongolia | 279 ug/ m3 |
| 2 | Botswana | 216 ug/m3 |
| 3 | Pakistan | 198 ug/m3 |
| 4 | Senegal | 145 ug/m3 |
| 5 | Saudi Arabia | 143 ug/m3 |
| 6 | Egypt | 138 ug/m3 |
| 7 | United Arab Emirates | 132 ug/m3 |
| 8 | Iran | 124 ug/m3 |
| 9 | Nigeria | 124 ug/m3 |
| 10 | Kuwait | 123 ug/m3 |
