There are currently 72 accredited airports in 20 countries at Level 1 'Mapping', representing 4.3% of European air passenger traffic.
There are currently 84 accredited airports in 18 countries at Level 2 'Reduction', representing 8.4% of European air passenger traffic.
There are currently 45 accredited airports in 12 countries at Level 3 'Optimisation', representing 19.2% 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 6 airports accredited at Level 4 'Transformation', representing 5.7% of European air passenger traffic.
There are currently 38 airports accredited at Level 4+ 'Transition’, representing 13.7% of European air passenger traffic.