I’d love to see a quantification of how the current shipping disruption compares with the impact of the low-sulfur bunker fuel standard that went into effect a few years back.

A really good question.

There was also a slowdown in international trade and pollution from flights in 2020, and a heavy reduction in ship transports in 2008. August 2020 had a short but impactful heat wave in Europe - in Germany, more people died from heat than from COVID-19 that year.