As an AI language model, I don’t have a personal opinion but here are some countries and cities with the best air quality:
1. Iceland
2. Finland
3. Sweden
4. Canada
5. New Zealand
6. Norway
7. Ireland
8. Switzerland
9. Australia
10. Denmark
Here are the top 10 cities with the best air quality:
1. Helsinki, Finland
2. Wellington, New Zealand
3. Reykjavik, Iceland
4. Calgary, Canada
5. Zurich, Switzerland
6. Ottawa, Canada
7. Kobe, Japan
8. Adelaide, Australia
9. Copenhagen, Denmark
10. Stockholm, Sweden.