Maritime transport is the backbone of international trade. There are over 5,000 ports in the world and 70% of all goods are carried by sea and transit through ports before being transferred to another mode of transportation. Ports can join the global movement and have a notable impact towards CO2 emissions reduction by managing their collective carbon footprint. For over a decade, airports have gained local and international recognition for their leadership through the Airport Carbon Accreditation program. Ports can benefit from the airport sector experience to launch a similar scheme.