Sometimes, things work out just right (or wrong, depending on your point of view) to create a deliciously ironic situation.

An expedition which set off from Plymouth on a 5,000 mile carbon-emission-free trip to Greenland ran into trouble and needed to be rescues by .... wait for it .... an 110,000 ton oil tanker.

I think they might have preferred to drown.
(Picture and story credit - The BBC)