In its fourth annual review, AdGreen suggested that halving the number of flight kilometres used by advertising executives could cut 21% of overall emissions, as well as making significant cuts to outlays on flights, hotels and daily allowances.

Reusing half of newly purchased hard drives would have saved 355 tonnes of carbon in 2025 and £900,000 in hardware costs, the review added.

Catering, equipment transport and generators were also highlighted as areas for savings, such as swapping beef on menus for more sustainable foods or switching generators to hydrotreated vegetable oil (HVO) fuel.

The review is based on data from advertising agencies using AdGreen’s Carbon Calculator, which measured 20,504 tonnes of carbon emissions across 2,295 wrapped productions – equivalent to the annual footprint of more than 1,700 UK citizens.

Jo Fenn, global director at AdGreen, said: “The industry is measuring more production activity than ever before, but we know we are still only seeing a small part of the picture.

“There is a huge industry-wide opportunity here. Every additional production measured unlocks opportunities to reduce more emissions and save more money, without compromising creativity.”