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Report Reveals Unrealistic Expectations for Sustainable Jet Fuel

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Hopes that sustainable jet fuel can significantly reduce aviation’s carbon footprint are unrealistic, according to a new report by the Institute for Policy Studies. The study highlights that despite public subsidies and ambitious targets, there is no scalable alternative to kerosene-based jet fuels soon.

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The report underscores the enormous challenge of scaling up sustainable aviation fuels (SAFs) to meet climate goals. Chuck Collins, co-author of the report, emphasizes the impracticality of these goals, stating that massive subsidies and unacceptable trade-offs would be required, diverting resources from more pressing decarbonization efforts.

The Biden administration has set an ambitious target of producing 3 billion gallons of SAFs by 2030, aiming to reduce aviation emissions by 20%. However, achieving this would necessitate a staggering 18,887% increase in production from 2022 levels. Despite increased funding and tax breaks provided by the Inflation Reduction Act, the feasibility of these targets remains questionable.

Globally, aviation contributes about 2% of all emissions, with the wealthiest individuals being the most significant contributors. The Institute for Policy Studies report argues that increasing SAF production could exacerbate environmental issues. Sustainable fuels still emit carbon dioxide and require substantial land use changes, which could threaten food security and natural carbon sequestration methods.

In the US, meeting the SAF production goal would require 114 million acres of corn, representing a 20% increase in current agricultural land dedicated to this crop. In the UK, replacing jet fuel with SAFs would necessitate using 50% of all agricultural land to maintain current flight levels.

Phil Ansell, director of the Center for Sustainable Aviation at the University of Illinois, acknowledges the steep challenges facing the aviation industry in its decarbonization efforts. Unlike other sectors, aviation cannot easily transition to battery power due to weight constraints, and alternative fuels like hydrogen present complex challenges.

While airlines like Virgin Atlantic have made headlines with flights powered by 100% SAFs, the report suggests that these efforts are insufficient. The aviation industry must confront the reality that achieving zero-emission flights is a far more complex and distant goal than previously anticipated.