A promise by the world’s leading shippers to only use zero-carbon shipping by 2040 will heap more pressure on shipowners to leapfrog straight to zero-emission fuels in their next newbuilding investment.

The move signed by Amazon, Ikea, Unilever and six other major global shippers includes eliminating heavy fuel oil and LNG in the transportation of their goods.

The signatories to the pledge, made under Aspen Institute's Cargo Owners for Zero Emission Vessels' group, are already canvassing other leading shippers and producers to join them.