CORSIA and Reducing Carbon Emissions in Global Aviation
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CORSIA, adopted by ICAO in 2016, requires airlines to offset the growth in emissions from international flights above 2019 levels using carbon credits. Its effectiveness depends on transparent carbon credit markets, independent verification and alignment between national and international policy.
The international aviation sector accounts for a significant share of global CO₂ emissions. As demand for air transport rises rapidly, regulation aimed at minimising environmental impact and reducing CO₂ emissions is becoming increasingly important. Against this backdrop, CORSIA (the Carbon Offsetting and Reduction Scheme for International Aviation), adopted by ICAO in 2016, is a global scheme that makes airlines responsible for offsetting their CO₂ emissions through the use of carbon credits. CORSIA provides a mechanism for reducing emissions from international flights, yet shortcomings in transparency and certain implementation challenges can undermine the scheme’s effectiveness.
The Core Structure of CORSIA and How It Is Implemented
CORSIA consists of a series of phases defined by ICAO. The scheme’s central objective is to offset the growth in emissions above 2019 levels. To offset this growth, airlines purchase carbon credits and thereby invest in environmental projects. The first phase, the voluntary period, covers the years 2024–2026, while in subsequent periods the obligation will become mandatory. The implementation of CORSIA, however, depends on regulations being aligned across countries and on verification being carried out correctly.
Transparency Issues and Challenges in the Carbon Credit System
The effectiveness of CORSIA depends directly on the transparency of the carbon credit system. A carbon credit is a certificate representing the offsetting of one tonne of CO₂ emissions. Yet the validity and accuracy of credits can be called into question because of certain transparency gaps. In particular, the use of the same carbon credit more than once — the problem known as “double counting” — threatens the chances of CORSIA succeeding. Double counting occurs when the same carbon credits are counted more than once, causing the actual emission reductions achieved to be overstated. Miscalculations of this kind deliver only the appearance of progress rather than genuine movement towards environmental targets.
For CORSIA to work, the accuracy and transparency of credits must be assured. The aviation sector must guarantee that global carbon credit trading is conducted correctly. This calls for independent audits and for central platforms on which credits are registered. Such platforms should track the purchase and sale of carbon credits, thereby ensuring transparency and preventing the same credit from being used more than once.
Policy Alignment and Global Cooperation
The success of CORSIA requires not only transparency but also international cooperation. Alongside CORSIA, some countries are considering national carbon pricing instruments or ticket taxes. Additional measures of this kind, however, may weaken the effectiveness of CORSIA as a global system. Local policies can conflict with international commitments and erode the strength of a multilateral approach. In that case, the worldwide application of CORSIA could be jeopardised and multilateral efforts weakened. For this reason, keeping policies aligned and strengthening CORSIA as an international system plays a critical role.
The Future of CORSIA and Its Global Impact
CORSIA is expected to make a substantial contribution to efforts to reduce CO₂ emissions in the global aviation sector. This will only be possible, however, if emissions are properly verified and the carbon credit system is made transparent. To meet its sustainability targets, the aviation sector must work together internationally and improve the credibility of carbon credit markets. In implementing CORSIA, transparency mechanisms need to be strengthened further and genuine emission reductions secured.
Throughout this process, for CORSIA to be effective worldwide it is vital that all countries participate and that verification is carried out on the principles of transparency and accuracy. Preventing errors such as double counting and making carbon credit trading orderly and traceable are among the fundamental conditions for the system to succeed.
Conclusion
CORSIA stands out as a significant step towards reducing emissions from international aviation. The effectiveness of the scheme, however, will depend not only on sound implementation but also on strengthening transparency and verification mechanisms. The success of CORSIA rests on the alignment of national policies and on the accuracy of carbon credit systems. For the global aviation industry to meet its goal of reducing CO₂ emissions, all countries must act together.
References:
The Core Structure of CORSIA and How It Is Implemented
CORSIA consists of a series of phases defined by ICAO. The scheme’s central objective is to offset the growth in emissions above 2019 levels. To offset this growth, airlines purchase carbon credits and thereby invest in environmental projects. The first phase, the voluntary period, covers the years 2024–2026, while in subsequent periods the obligation will become mandatory. The implementation of CORSIA, however, depends on regulations being aligned across countries and on verification being carried out correctly.
Transparency Issues and Challenges in the Carbon Credit System
The effectiveness of CORSIA depends directly on the transparency of the carbon credit system. A carbon credit is a certificate representing the offsetting of one tonne of CO₂ emissions. Yet the validity and accuracy of credits can be called into question because of certain transparency gaps. In particular, the use of the same carbon credit more than once — the problem known as “double counting” — threatens the chances of CORSIA succeeding. Double counting occurs when the same carbon credits are counted more than once, causing the actual emission reductions achieved to be overstated. Miscalculations of this kind deliver only the appearance of progress rather than genuine movement towards environmental targets.
For CORSIA to work, the accuracy and transparency of credits must be assured. The aviation sector must guarantee that global carbon credit trading is conducted correctly. This calls for independent audits and for central platforms on which credits are registered. Such platforms should track the purchase and sale of carbon credits, thereby ensuring transparency and preventing the same credit from being used more than once.
Policy Alignment and Global Cooperation
The success of CORSIA requires not only transparency but also international cooperation. Alongside CORSIA, some countries are considering national carbon pricing instruments or ticket taxes. Additional measures of this kind, however, may weaken the effectiveness of CORSIA as a global system. Local policies can conflict with international commitments and erode the strength of a multilateral approach. In that case, the worldwide application of CORSIA could be jeopardised and multilateral efforts weakened. For this reason, keeping policies aligned and strengthening CORSIA as an international system plays a critical role.
The Future of CORSIA and Its Global Impact
CORSIA is expected to make a substantial contribution to efforts to reduce CO₂ emissions in the global aviation sector. This will only be possible, however, if emissions are properly verified and the carbon credit system is made transparent. To meet its sustainability targets, the aviation sector must work together internationally and improve the credibility of carbon credit markets. In implementing CORSIA, transparency mechanisms need to be strengthened further and genuine emission reductions secured.
Throughout this process, for CORSIA to be effective worldwide it is vital that all countries participate and that verification is carried out on the principles of transparency and accuracy. Preventing errors such as double counting and making carbon credit trading orderly and traceable are among the fundamental conditions for the system to succeed.
Conclusion
CORSIA stands out as a significant step towards reducing emissions from international aviation. The effectiveness of the scheme, however, will depend not only on sound implementation but also on strengthening transparency and verification mechanisms. The success of CORSIA rests on the alignment of national policies and on the accuracy of carbon credit systems. For the global aviation industry to meet its goal of reducing CO₂ emissions, all countries must act together.
References:
- ICAO, CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation), ICAO.
- "The Impact of CORSIA on Global Aviation," Aviation Week Network, Aviation Week.
- "Carbon Pricing and the Aviation Industry: How CORSIA Aims to Tackle Emissions," International Transport Forum, ITF.