There are currently 79 accredited airports in 17 countries at Level 1 'Mapping', representing 5.0% of European air passenger traffic.
There are currently 83 accredited airports in 18 countries at Level 2 'Reduction', representing 7.4% of European air passenger traffic.
There are currently 47 accredited airports in 15 countries at Level 3 'Optimisation', representing 20.0% of European air passenger traffic.
There are currently 33 accredited airports in 16 countries at Level 3+ 'Neutrality', representing 12.7% of European air passenger traffic.
There are currently 7 airports accredited at Level 4 'Transformation', representing 6.1% of European air passenger traffic.
There are currently 40 airports accredited at Level 4+ 'Transition’, representing 14.9% of European air passenger traffic.