This article suggests it probably isn't the main cause: https://www.carbonbrief.org/analysis-how-low-sulphur-shipping-rules-are-affecting-global-warming/ https:

This article suggests it probably isn't the main cause: https://www.carbonbrief.org/analysis-how-low-sulphur-shipping-rules-are-affecting-global-warming/ https://www.carbonbrief.org/analysis-how-low-sulphur-shippin... There was also an underwater volcano that put a lot of water vapor in the upper atmosphere that could be a culprit. (On top of the ongoing trend of warming of course.) https://www.carbonbrief.org/tonga-volcano-eruption-raises-imminent-risk-of-temporary-1-5c-breach/ https://www.carbonbrief.org/tonga-volcano-eruption-raises-im...