Aviation Industry: Sustainability and SDG Alignment
By Suman Dutta, Research And Insights
The aviation industry remains a central pillar of global connectivity and economic development, supporting more than 65 million jobs worldwide and contributing approximately 3.5% to global GDP. At the same time, it faces mounting pressure to reduce its environmental footprint and align its growth trajectory with the United Nations Sustainable Development Goals (SDGs).
Commercial aviation accounts for roughly 0.9 billion tonnes of CO₂ emissions annually, representing about 2.5% of total global emissions and nearly 10% of emissions from the transport sector. Around 75–80% of aviation’s environmental impact stems from jet fuel combustion, while non-CO₂ effects such as contrails and nitrogen oxides add a further 15–20% to its warming impact. With air travel demand projected to grow steadily in the coming decades, decarbonization has become central to the industry’s long-term viability.
In response, the global aviation sector has committed to achieving net-zero carbon emissions by 2050. Interim measures include fleet modernization, operational efficiency improvements, and the scaling of Sustainable Aviation Fuel (SAF). The Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) forms a key component of this strategy, covering approximately 35% of international aviation emissions and aiming to offset close to one billion tonnes of CO₂ over time.
Among available mitigation pathways, Sustainable Aviation Fuel is widely regarded as the primary decarbonization lever. Depending on feedstock and production method, SAF can reduce lifecycle emissions by 60–85% compared to conventional jet fuel. However, it currently represents around 1% or less of total aviation fuel consumption. Production levels remain limited, at roughly one million tonnes in 2024, with modest growth expected in the near term. Meeting net-zero targets would require annual production levels in the hundreds of billions of litres by 2050, highlighting a substantial supply gap.
Alongside fuel substitution, improvements in aircraft design and operational efficiency continue to reduce emissions intensity. Modern aircraft are significantly more fuel efficient per passenger than those in service in the 1960s, with average annual efficiency gains of 1–2%. Advances in lightweight composite materials, aerodynamic design, engine performance, AI-assisted flight planning, and optimized routing contribute incrementally to emissions reduction.
Looking further ahead, alternative propulsion technologies are under development. Electric aircraft are being explored primarily for short-haul routes, while hydrogen-powered aircraft are projected to enter commercial service between 2035 and 2040. At the same time, over 40% of global air traffic is represented by airlines that have adopted targets for SAF usage by 2030.
Sustainability efforts extend beyond aircraft. Airports are investing in renewable-powered terminals, energy-efficient infrastructure, electric ground support equipment, and water and waste management systems. Many major airports have announced targets to achieve net-zero operational emissions between 2030 and 2050.
Policy mechanisms also play a significant role. In addition to CORSIA, regional carbon pricing frameworks such as the EU Emissions Trading System apply to aviation. Collaboration across airlines, manufacturers, fuel producers, and governments is increasingly framed as essential to achieving meaningful emissions reductions.
Despite progress, significant challenges remain. SAF production remains far below required levels, costs are estimated to be two to five times higher than conventional jet fuel, and infrastructure requirements for hydrogen and electric aviation are substantial. Meanwhile, strong growth in air traffic demand risks offsetting efficiency gains.
Aviation’s contribution to global emissions remains relatively modest in percentage terms, but its projected growth underscores the urgency of coordinated action. Achieving net-zero by 2050 will depend on scaling sustainable fuels, accelerating technological innovation, strengthening policy mechanisms, and mobilizing large-scale investment across the sector.
Refrence -
International Air Transport Association. (2023). Net Zero Carbon Emissions by 2050.
https://www.iata.org/en/programs/environment/net-zero-carbon/
International Civil Aviation Organization. (2022). Environmental Report: Aviation and Climate Change.
International Civil Aviation Organization. (2018). Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA).
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