Alright, if they’re having a romp in the afterlife in some capacity, they aren’t ghosts. There’s a kind of underlying implication they’re sticking around for some worldly purpose or reason. Often this is used for metaphor about moving on in your life (or rather afterlife).
I’ve heard a statistic that goes something like: If you were to just not exist, you would only save about 1 second worth of emissions globally. Whatever individual action you do to reduce emissions from your lifestyle only go so far.
And like others have mentioned, there are the other, less legal forms of direct action.