Air pollution has held human-induced warming in check for the past century by acting as an artificial sunshade, a new study shows
Clean-up of sulphur emissions from global shipping has been implicated in past research. But that clean-up only began in 2020, so it is considered too weak to explain the full extent of this acceleration. Nasa researchers have suggested that changes in clouds could play a role, either through reductions in cloud cover in the tropics or over the North Pacific.
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