Airports can participate in the programme at one of the four main progressively stringent levels of accreditation: 1. Mapping; 2. Reduction; 3. Optimisation; and 4. Transformation. In addition, airports at level 3 and 4 can choose to offset their residual emissions, thereby achieving level 3+ (Neutrality) and 4+ (Transition) respectively.
In 2020, Level 4 (Transformation) and 4+ (Transition) have been added to the Airport Carbon Accreditation programme to align it with the objectives of the Paris Agreement to limit the increase of global average temperature to 2°C above pre-industrial levels and aim to not exceed 1.5°C. Levels 4 and 4+ have been introduced as an interim step towards the long-term goal of supporting airports in achieving net zero carbon emissions. Level 4 and 4+ will therefore encourage airports to reduce their emissions in line with the latest scientific and political developments and meet growing public and stakeholder expectations.
Expanding on its remarkable history and acknowledging the necessity for constant enhancement, the Airport Carbon Accreditation programme has introduced Level 5, the highest achievement within the programme. Airports can now validate their efforts in maintaining a Net Zero carbon balance for Scopes 1 and 2 while also addressing Scope 3 emissions, showcasing their commitment to sustainable future for the aviation sector as a whole.