Claims by a maritime association promoting the use of scrubbers that an investigation into the health effects of ship engine emissions prove that heavy fuel oil (HFO) is safer than low-sulphur diesel are not the full story.

Instead, the report advises that all exhaust gas should be filtered.

Responding to Singapore’s ban on open-loop scrubber discharging last December, the Exhaust Gas Cleaning Systems Association (EGCSA) claimed: “A study by the University of Rostock...