All the developed countries are clean but the most clean is Australia then New Zealand , usa, UK, Norway etc.
Tasmania.
Switzerland has the best environmental performance of any nation so it is highly likely this nation has the cleanest air.
Pakistan is the cleanest country in the world
There are many different opinions for this answer but the most common answer for cleanest country would be SWITZERLAND
Yes Tasmania is said to have the cleanest air in the world because of the low population
usa
No
Canada.
U.a.e
Canada
The cleanest country in Europe, and of the world, as of 2010, is Iceland. This is taken from the Environmental Performance Index which is a UN conducted list that ranks each country on, well, its environmental performance (pollution, scenery, cleanliness, air, waters, etc.).
Hawaii.
My India