UK would need forest ‘twice size of London’ to offset new airport expansion

By Josh Gabbitiss and Verner Viisainen
CarbonBrief.org
January 27, 2025
Category: Carbon, Climate & Bioenergy
Region: International

A forest twice the size of Greater London would need to be planted in the UK to cancel out the extra emissions from the expansion of Heathrow, Gatwick and Luton airports, Carbon Brief analysis reveals. New runaways at these airports surrounding London would result in cumulative emissions of around 92m tonnes of extra carbon dioxide equivalent (CO2e) by 2050, if the number of flights increases in line with their operating company targets. For example, offsetting these emissions would require more than 300,000 hectares of trees to be planted within just a few years. This equates to all the trees planted in the UK since 2000… Reeves has stressed that “sustainable aviation fuels” (SAFs) and electric planes could help to offset these emissions. However, such technologies are still in the early stages of deployment and previous Carbon Brief analysis suggests the role of SAFs in achieving net-zero may be limited.

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