David HoWhether a reduction in sulfur emissions from ships is responsible for global warming is unclear.
What is clear is that the billions of tonnes of washwater used in sulfur scrubbers and discharged directly overboard is toxic to marine life.
Global scrubber washwater discharges under IMO’s 2020 fuel sulfur limit - International Council on Clean Transportation
Global assessment of the mass of washwater discharges expected from ships that had scrubbers installed by the end of 2020, based on pre-pandemic traffic patterns.
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