Shale oil production and groundwater: What can we learn from produced water data?

PLoS One · 2021 · PMC8087075 · PMID 33930038

Europe PMC DOI

hedged sentence

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closest p

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boldest claim

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an obvious trendno p-value reported

Comment-2: If the increase of the TDS, chloride, sodium, and calcium is an obvious trend, these related compounds play what’s role in geological formation?

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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.