Heathrow Can Expand Only If Airlines Pay for Carbon Removal, Advisers Say
The Climate Change Committee says Heathrow should only be allowed to expand if airlines pay to take carbon dioxide back out of the atmosphere. Building a third runway and new terminals would breach the UK's carbon budgets and make reaching net zero by 2050 impossible under current policies, the committee found. The Guardian
Carbon budgets work like a spending limit for pollution. They set legal caps on UK emissions over time. Net zero means any emissions that remain are balanced by removals.
The advice was prepared in response to a request from the UK Department for Transport. The department asked for the committee's view on proposed amendments to the Heathrow Expansion National Policy Statement and on the wider role of aviation in meeting UK carbon budgets in the context of Heathrow expansion. Climate Change Committee
Aviation emissions have more than doubled since 1990, while emissions across the UK economy as a whole have halved. Heathrow is currently responsible for around half of UK aviation emissions. Even without Heathrow expansion, aviation emissions would not fall at all by 2050 under current policy. The committee estimated that the full impact of Heathrow expansion would account for 6.9% of remaining UK carbon emissions in 2050.
The committee said expansion could only fit within UK climate commitments if aviation becomes more efficient, uses an increasing share of sustainable aviation fuels, and pays for permanent removal and storage of carbon. Sustainable fuels are lower-carbon alternatives to standard jet fuel. Engineered removals are technologies that pull carbon from the air and store it underground. It recommended the government legislate policies requiring the aviation industry to fully address its emissions by 2050, either directly or by purchasing engineered removals.
CCC chair Nigel Topping said the government cannot expand Heathrow without requiring the aviation industry to clean up its emissions. He said the polluter-pays principle must apply. Airlines, not taxpayers or other sectors, would carry the abatement cost, which is the cost of cutting emissions.
The committee estimated that airline costs for sustainable fuels and carbon removal would add about £150 to a return flight to Alicante by 2050 and about £400 to a flight to New York. The rise would be phased in gradually over 25 years. It said policies to make airlines take responsibility for cleaning up emissions should take inequality into account, but it stopped short of recommending a frequent flyer levy, a charge that would rise with how often a person flies.
Friends of the Earth campaigner Tony Bosworth accused the CCC of "pulling its punches" over reliance on sustainable fuels and carbon removals to justify Heathrow expansion. The Airports National Policy Statement will be the framework that guides the upcoming planning decision on expansion of Heathrow airport. A committee of MPs said the UK government had not demonstrated whether economic benefits from airport expansion outweigh climate impacts.
The broader context here is a clash between a legally binding net-zero path and a sector where cleaner fuels and removals do not yet exist at scale. The CCC is trying to square expansion with carbon budgets by shifting the duty onto operators through required fuel use and engineered removals, rather than through limits on demand for flights.
Looking at what this means for the planning and legislative sequence, the advice tightens the terms of consent without blocking the project outright. Ministers must now decide whether to amend the National Policy Statement to embed enforceable airline obligations to 2050, price those obligations into tickets over 25 years, and defend the equity effects. If those mechanisms are legislated and durable, expansion has a compliant route. If they slip, the 6.9% share in 2050 leaves little headroom for other sectors.
