There are currently 62 accredited airports in 20 countries at Level 1 'Mapping', representing 3.2% of European air passenger traffic.
There are currently 71 accredited airports in 18 countries at Level 2 'Reduction', representing 8.2% of European air passenger traffic.
There are currently 30 accredited airports in 12 countries at Level 3 'Optimisation', representing 18.5% of European air passenger traffic.
There are currently 34 accredited airports in 16 countries at Level 3+ 'Neutrality', representing 13.6% of European air passenger traffic.
There are currently 15 airports accredited at Level 4 'Transformation', representing 8.0% of European air passenger traffic.
There are currently 27 airports accredited at Level 4+ 'Transition’, representing 11.4% of European air passenger traffic.