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The Clean Air Task Force (CATF) recommends a cautious, safeguard-driven integration of permanent carbon removals (specifically DACCS and BioCCS) into the EU ETS to avoid deterring direct emissions reductions. The briefing argues for expanding the ETS scope to include extra-EEA flights, vessels above 400 gross tonnage, and municipal waste incineration and landfills. It specifically highlights the need to address non-CO2 aviation impacts, such as contrails, through financial incentives and robust monitoring. To support the transition, CATF suggests earmarking aviation ETS revenues for sustainable aviation fuels (SAF) and maintaining SAF allowances beyond 2030.

The report proposes optimizing the limited supply of sustainable aviation fuel (SAF) by targeting its use at airports with the highest contrail and particulate matter (PM) impacts. Analysis of 16.6 million flights in 2024 reveals that 2% of flights generate 80% of contrail-related warming. In the U.S., JFK, LAX, and O'Hare are identified as primary targets, while Heathrow, Istanbul Airport, and Paris CDG are the top candidates in Europe. The study finds that a 50% SAF blend can reduce LTO particulate emissions by 26-28% and contrail-related warming by 30-40%. While airport-wide targeting is simplest, time-based and flight-based strategies are more fuel-efficient. Implementation faces logistical hurdles, particularly at airports using hydrant fuel systems, but the report suggests these can be overcome through policy incentives and infrastructure investment.

Carbon Market Watch asserts that CORSIA is a "phantom scheme" due to patchy enforcement and reliance on low-quality offsets. The author highlights that US airlines, including United, Delta, and American Airlines, are unlikely to pay for their emissions under CORSIA, especially under the Trump administration. Consequently, the document urges the EU to expand the EU ETS to all departing EEA flights to generate revenue for transport decarbonisation and ensure airlines are held accountable for their carbon pollution.

Carbon Market Watch asserts that private jet use in Europe is under-regulated despite being the most polluting form of travel. The organization proposes multiplying the carbon price by four for private jets and expanding the scope of the EU Emissions Trading System (EU ETS) to cover the 67% of private jet emissions currently exempt. Such measures could raise between €304 million and €2.2 billion annually by 2030, depending on the scope of coverage and the inclusion of non-CO2 effects. The document also advocates for aviation fuel taxation and the prioritization of low-cost solutions, such as contrail avoidance, over subsidies for unsustainable bio-kerosene.

RMI conducted pilots with BCG, Roland Berger, and Estuaire to compare contrail accounting methods. The results show that a bottom-up, flight-specific approach is significantly more accurate than the standard 1.7x multiplier, revealing that 2% of flights cause 80% of contrail impacts. The report advocates for a phased transition toward high-fidelity accounting to enable targeted corporate travel policies and alignment with emerging EU regulations.

The document contends that the EU's decision to exempt international aviation from the ETS since 2012, largely due to US political and industry pressure, has failed to reduce emissions. It criticizes the ICAO's CORSIA framework as ineffective and calls for the EU to resume pricing international aviation emissions, proposing that the resulting revenue be directed toward global climate finance for vulnerable countries.

The report examines four scenarios for extending the EU ETS aviation scope beyond intra-EEA flights, potentially increasing revenues up to 1,160 billion € by 2040. It argues that including non-CO2 effects and private jets would significantly boost funding for sustainable aviation fuels (SAF), rail infrastructure (TEN-T), and international climate finance (NCQG).

The document outlines the difficulties of decarbonizing commercial aviation, noting that it contributes nearly 4% of historical global warming when non-CO2 effects are included. It highlights the limitations of sustainable aviation fuels (SAF) and electric aircraft, the disproportionate impact of frequent flyers, and the prevalence of greenwashing in the industry.

The document outlines the difficulty of decarbonizing commercial aviation, noting that while it contributes around 4% of all-time global warming, it lacks the immediate clean technological fixes available to other sectors. It highlights the limitations of sustainable aviation fuels (SAF), the outsized impact of frequent fliers, and the role of non-CO2 emissions like contrails. The guide encourages reporters to scrutinize industry greenwashing, report on how climate change increases flight turbulence and heat-related disruptions, and consider demand reduction as a necessary strategy to meet 1.5 degrees Celsius targets.

The report examines non-CO2 aviation effects, specifically contrails, which contribute to surface warming at a rate potentially similar to CO2 emissions. It evaluates three primary mitigation strategies: reducing aromatics in conventional fuel, increasing SAF adoption, and implementing flight path deviations to avoid ice-supersaturated regions (ISSR). While fuel hydrotreatment can reduce soot, the report warns that the energy-intensive process may increase CO2 emissions, potentially offsetting climate gains. SAF is presented as a more effective long-term solution, with targeted use on high-impact flights offering 9-15 times the benefit of low-level global blending. Operational mitigation via AI and satellite-based re-routing shows promise, though it faces challenges from air traffic congestion and weather forecasting inaccuracies. The document concludes that a combination of these technologies and specific non-CO2 policies is necessary to reduce the sector's total climate impact.

The report highlights that while contrail-induced warming is a significant climate problem, it is solvable through targeted solutions like flight rerouting. It emphasizes that the primary barrier to accurate contrail prediction is a lack of reliable humidity data at cruising altitudes. The document advocates for increased investment in atmospheric science, expanded flight trials to test operational feasibility, and the integration of air traffic management to prevent airspace congestion as contrail avoidance is scaled.

The report argues that achieving net-zero aviation emissions by 2050 requires a multi-fuel approach because sustainable biofuels alone cannot meet projected energy demands. It examines synthetic fuels (e-fuels) as a scalable drop-in solution, though currently expensive, and analyzes the potential of hydrogen and ammonia for regional and domestic flights. While electrification is limited to niche urban air mobility, the report suggests a 2050 fuel mix comprising 86% bio- and synthetic SAF and 14% zero-carbon fuels (hydrogen and ammonia) as a plausible path to decarbonization, provided there is massive scale-up of low-carbon hydrogen production and supportive policy frameworks.

The document analyzes the growth of commercial aviation and its contribution to climate change. It details the composition of aircraft emissions, the significant warming effect of contrail-induced cirrus clouds, and the projected recovery of air traffic following the COVID-19 pandemic. While aircraft efficiency has improved, the overall volume of passengers and freight is expected to increase, potentially tripling emissions by 2050. The brief also discusses regulatory efforts, such as ICAO's CO2 standards, and the disproportionate per capita fuel consumption in the United States.

The document analyzes the climate impact of commercial aviation, noting that while aircraft efficiency has improved, the rapid growth of the industry—particularly in developing nations—continues to drive up total emissions. It details the contributions of CO2 and non-CO2 effects like contrails, the regulatory landscape including ICAO standards, and the projected recovery of air traffic following the COVID-19 pandemic.

The document analyzes the growth of commercial aviation and its contribution to climate change, noting that while aircraft efficiency has improved, increasing traffic is driving up total emissions. It details the specific warming effects of CO2 and contrails, the role of air freight, and the economic drivers—particularly the expanding middle class in Asia—that are projected to triple commercial aircraft emissions by 2050. It also discusses international and U.S. regulatory efforts to set CO2 standards for new aircraft.

The document examines the environmental and social impacts of the aviation industry, noting that rapid growth in passenger and freight demand cancels out technological efficiency gains. It highlights the sector's contribution to climate change through greenhouse gases and radiative forcing, as well as local impacts like noise and air pollution. The authors propose a demand management strategy based on three pillars: internalising external costs via emission charges, shifting short-haul passengers to rail, and substituting physical travel with electronic communication. The paper concludes with nine specific policy recommendations, including a ban on night-time flights and the adoption of an 'environmental bubble' concept for airports.