Variation and internal-external driving forces of grey water footprint efficiency in China's Yellow River Basin.

PLoS One · 2023 · PMC10032503 · PMID 36947510

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a decreasing trendno p-value reported

They measure the GWF of 31 Chinese provinces and cities from 2000–2014 and 1998–2016, respectively, and similarly find that the GWF shifts from an increasing to a decreasing trend from the year 2007 onwards.

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