There was some stuff recently about reducing sulfur emissions from cargo ships. It sounds like this was done for health reasons. Is there something about the s

There was some stuff recently about reducing sulfur emissions from cargo ships. It sounds like this was done for health reasons. Is there something about the stuff being recommended here that makes this not very nasty to just dump all over the ocean? $350m/year sounds very cheap though. Just convince some billionaire to pay for this for the next 40 years?