The effects of trade openness on decoupling carbon emissions from economic growth - Evidence from 182 countries.

J Clean Prod · 2021 · PMC7443063 · PMID 32863606

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a clear trendno p-value reported

For example, China, which uses coal as its main energy source, showed a clear trend of improving its energy structure.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.