Specifically your point about bunker fuel, this is now out of date a bit. The International Maritime Organization rules about ultra-low sulfur fuels came into effect 1/1/2020. Ironically though, this just affects sulfur, and so while a lot fewer people will die of air pollution as a result, the reduction in particulate matter (and complementary rise in greenhouse effect) is actually predicted to result in a marginal increase in global temperatures. I agree with you that much of the environmental movement in the West feels inadequate or focusing in insignificant problems (plastic straws anyone?), but from my experience in the renewable industry, people are talking about this, just too few of them.

http://www.imo.org/en/MediaCentre/HotTopics/Pages/Sulphur-20...