The debate over use of scrubbers to meet new IMO emissions laws is heating up, with a detailed defence from a shipowners group and further attacks by opponents.

The support comes from a coalition of scrubber-using owners known as the Clean Shipping Alliance 2020.

The group, through spokesperson Hamish Norton of Star Bulk Carriers, is challenging criticism of the exhaust-cleaning devices from various quarters, including shipowners such as Paddy Rodgers of Euronav.