Aviation is the most climate-intensive form of transport. Green fuels, new technology and demand reduction can put us on a path to cleaner flying.

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Emissions from aviation are a significant contributor to climate change. Airplanes burn fossil fuel which not only releases CO2 emissions but also has strong warming non-CO2 effects due to nitrogen oxides (NOx), vapour trails and cloud formation triggered by the altitude at which aircraft operate.

These non-CO2 effects contribute twice as much to global warming as aircraft CO2 and were responsible for two-thirds of aviation’s climate impact in 2018.

Subsidising pollution

Aviation remains heavily subsidised, with all parts of the sector – from airports to aircraft to airlines – receiving state support. Aid is being given to airports by local, regional or national authorities – often in breach of EU guidelines concerning state aid. At EU and national level, aid is also granted to aircraft manufacturers.

And airlines are exempt from paying tax on their fuel and VAT on their tickets. These subsidies result in artificially cheap ticket prices, which serve to drive up demand and reduce incentives for more sustainable aviation. Any public money should come with green strings attached.

Clean tech

Cleaner fuels and changes to aircraft design can play an essential role in reducing emissions from flying. Ensuring planes are as efficient as possible and are capable of being powered by alternatives to fossil kerosene, is essential. Both pathways have a role to play, and will require cooperation between industry and regulators.

However, the right type of fuels need to be pursued. Using crop-based biofuels would cause negative effects such as driving deforestation or increasing food prices. Therefore the focus needs to be on Sustainable Advanced Fuels (SAF) – the advanced referring to fuels which are produced using feedstocks which don’t compete with food, or feedstocks derived from renewable electricity, known as e-kerosene.

The EU’s emission trading system (ETS) remains one of the few measures in place attempting to address the sector’s soaring emissions. However, airlines still get more than half of their pollution permits for free and crucial reforms to the EU ETS are still needed to make it fit for purpose.

Plane challenges

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