There are currently 78 accredited airports in 15 countries at Level 1 'Mapping', representing 4.8% of European air passenger traffic.
There are currently 37 accredited airports in 19 countries at Level 2 'Reduction', representing 7.9% of European air passenger traffic.
There are currently 23 accredited airports in 10 countries at Level 3 'Optimisation', representing 28.8% of European air passenger traffic.
There are currently 46 accredited airports in 16 countries at Level 3+ 'Neutrality', representing 22.8% of European air passenger traffic.
There are currently 10 airports accredited at Level 4 'Transformation', representing 2.8% of European air passenger traffic.
There are currently 10 airports accredited at Level 4+ 'Transition’, representing 5.5% of European air passenger traffic.