Which 10 airports have been recognized for their outstanding sustainability practices and eco-friendly initiatives?

1. Helsinki Airport, Finland
2. Oslo Airport, Norway
3. San Francisco International Airport, USA
4. Vancouver International Airport, Canada
5. Changi Airport, Singapore
6. Incheon International Airport, South Korea
7. Copenhagen Airport, Denmark
8. Manchester Airport, UK
9. Schiphol Airport, Netherlands
10. Frankfurt Airport, Germany