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China reduced sulphur dioxide emissions by more than two-thirds in past 15 years
(ourworldindata.org)
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It's offset by their CO2 emissions, which almost tripled in the last 20 years,
https://www.macrotrends.net/global-metrics/countries/CHN/china/carbon-co2-emissions
Their greenhouse gas emissions increased six fold.
https://www.macrotrends.net/global-metrics/countries/CHN/china/ghg-greenhouse-gas-emissions
But it's a small step for hankind