There are currently 79 accredited airports in 17 countries at Level 1 'Mapping', representing 5.1% of European air passenger traffic.
There are currently 84 accredited airports in 20 countries at Level 2 'Reduction', representing 7.3% of European air passenger traffic.
There are currently 47 accredited airports in 15 countries at Level 3 'Optimisation', representing 16.8% of European air passenger traffic.
There are currently 32 accredited airports in 15 countries at Level 3+ 'Neutrality', representing 12.1% of European air passenger traffic.
There are currently 8 airports accredited at Level 4 'Transformation', representing 9.6% of European air passenger traffic.
There are currently 41 airports accredited at Level 4+ 'Transition’, representing 15.5% of European air passenger traffic.