> Greenpeace didn’t save the whales, switching from whale oil to petroleum and palm oil did
According to [1]: The depletion of some whale species to near extinction led to the banning of whaling in many countries by 1969, and to a worldwide cessation of whaling as an industry in the late 1980s.
This does sound more like Greenpeace (founded 1971) being the reason than switching to petroleum (no reason to expect much use for whale oil past WW2) to me. But surely Greenpeace is not the only reason.