Some of the world's largest retailers have made a commitment to only using zero carbon shipping by 2040.
Amazon, Ikea, Michelin, Unilever and others have made the commitment at the Aspen Institute, a corporate decarbonisation group, under its newly formed Cargo Owners for Zero Emission Vessels group.
Aspen Institute chief executive Dan Porterfield described the commitment as a "historic step in the fight against climate change".
