If you look at a map of lightning near the Port of Singapore, you'll notice an odd streak of intense lightning activity right over the busiest shipping lane in the world.
(…) exhaust plumes from ships are associated with an increase in the frequency of lightning (…)
(…) to limit toxicity to people near ports, the International Maritime Organization – a United Nations agency that oversees shipping rules and security – began regulating sulfur emissions in 2020. (…)
The ban will also increase global warming by 0.3 °C: https://www.nature.com/articles/s43247-024-01911-9
to be clear that doesn’t mean we should stop trying to reduce pollution. that just means we need to go harder on reducing greenhouse gasses too.