The article indicates that the ship pollution does increase reflective cloud cover, but also exceeds the clouds saturation point. So excess pollution past this point does not continue to increase cloud reflection and would be a negative. It doesn’t really indicate where that tipping point is. But I’d read that as less pollution is still the better overall choice. They also indicated the same effect could be achieved with non pollution methods. Again suggesting less pollution is probably still the better option.

The article also doesn’t really indicate if this pollution cloud cover is net positive over the CO2 emissions of said ships. Certainly interesting regardless.

I’m a layperson so I may be reading it wrong but that was my takeaway.