BEIJING, July 29 (Reuters) - China COSCO Shipping signed

a memorandum of understanding (MOU) on Monday with the world's

No. 4 iron ore supplier, Fortescue, to jointly develop

technology to lower carbon emissions and build green fuel supply

chain.

Both companies will also explore the construction and

deployment of COSCO shipping vessels or jointly owned vessels

using green ammonia as marine fuel to transport iron ore and

other minerals to reduce carbon emissions in the China-Australia

iron ore green shipping corridor.