It is always interesting to watch Space-X's return to Earth. No ocean pollution. That, by the way, is becoming a focus of those studying Earth ocean heating. There is a lot of metal debris in the oceans as well as plastics. It is believed the metal and debris in the seas and oceans are actually contributing to their heating. The metal and debris retain the heat that is transferred to them differently than ocean water. The metal and debris encourage the upticks in heating by maintaining those temperatures differently.
So, thank you to Space-X for being a responsible citizen to Earth's oceans.