BAHAMAS IS THE CLEANEST COUNTRY IN THE WORLD.
According to the World Air Quality Report 2019, Bahamas is the cleanest country and its capital city Nassau is the cleanest capital in the world.
TOP 20 CLEANEST COUNTRIES IN THE WORLD
| RANK | COUNTRY | μg/ m3 |
| 1 | BAHAMAS | 3.3 |
| 2 | U.S.VIRGIN ISLANDS | 3.5 |
| 3 | ICELAND | 5.6 |
| 4 | FINLAND | 5.6 |
| 5 | ESTONIA | 6.2 |
| 6 | SWEDEN | 6.6 |
| 7 | NORWAY | 6.9 |
| 8 | NEW ZEALAND | 7.5 |
| 9 | AUSTRALIA | 8.0 |
| 10 | ECUADOR | 8.6 |
| 11 | UNITED STATES OF AMERICA | 9.0 |
| 12 | PORTUGAL | 9.3 |
| 13 | MALTA | 9.4 |
| 14 | DENMARK | 9.6 |
| 15 | LUXEMBOURG | 9.6 |
| 16 | SPAIN | 9.7 |
| 17 | RUSSIA | 9.9 |
| 18 | PUERTO RICO | 10.2 |
| 19 | COASTA RICA | 10.4 |
| 20 | UNITED KINGDOM | 10.5 |
TOP 20 CLEANEST CAPITALS IN THE WORLD
| RANK | CAPITAL | COUNTRY | μg/ m3 |
| 1 | NASSU | BAHAMAS | 3.3 |
| 2 | CHARLOTTE AMALIE | U.S VIRGIN ISLANDS | 3.6 |
| 3 | REYKJAVIK | ICELAND | 5.5 |
| 4 | TALLINN | ESTONIA | 5.5 |
| 5 | HELSINKI | FINLAND | 6.0 |
| 6 | STOCKHOLM | SWEDEN | 6.1 |
| 7 | WELLINGTON CITY | NEW ZEALAND | 6.7 |
| 8 | OTTAWA | CANADA | 7.3 |
| 9 | OSLO | NORWAY | 7.5 |
| 10 | QUITO | ECUADOR | 8.6 |
| 11 | MADRID | SPAIN | 9.2 |
| 12 | LISBON | PORTUGAL | 9.4 |
| 13 | COPENHAGEN | DENMARK | 9.6 |
| 14 | BERLIN | GERMANY | 9.7 |
| 15 | LUXEMBOURG | LUXEMBOURG | 9.9 |
| 16 | MOSCOW | RUSSIA | 10.0 |
| 17 | DUBLIN | IRELAND | 10.6 |
| 18 | AMSTERDAM | NETHERLANDS | 10.7 |
| 19 | BERN | SWITZERLAND | 10.9 |
| 20 | CAPETOWN | SOUTH AFRICA | 11.2 |
