Revisiting China's provincial energy efficiency and its influencing factors.

Energy (Oxf) · 2020 · PMC7382643 · PMID 32834422

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showed a trendno p-value reported

Together with the backward management and technology, energy efficiency showed a trend of declining instead of increasing.

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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.