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Fashion has committed to decarbonisation, but overhauling the supply chain is costly work — an estimated $1 trillion worth, according to the Apparel Impact Institute (AII). Because most of fashion’s emissions are generated in the supply chain, brands depend on suppliers to take on the burden of reducing them. Yet, suppliers already operate on thin margins, are often based in less socioeconomically advantaged countries and are largely not funded by brands to make the necessary investments, which involve transitioning to renewable energy and updating equipment.