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Volume 6 Issue 10, October 2025

Global crop water footprints

Crop production accounts for the largest share of global green and blue water use. In 2020, 5.6 trillion m3 of green water and 1.2 trillion m3 of blue water were used for crop production globally; total crop water consumption increased 9% compared with the previous 10 years. Rice, maize, wheat, soybeans and oil palm consume the largest quantities of water. River basins such as the Indus and Ganges are operating far beyond sustainable limits, risking food security for many hundreds of millions of regional inhabitants.

See Chukalla et al.

Image: Nick Rains/Corbis Documentary/Getty. Cover design: Tulsi Voralia

Correspondence

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Comment & Opinion

  • Food is increasingly framed as a security issue — not just as an allusion to external shocks that may put it at risk, but also as a reflection of a political agenda that prioritizes increased agricultural output rather than the systemic changes needed to create more just and sustainable food futures. European food policy must align with scientific evidence, sustainability commitments and democratic principles to create true food security.

    • Ellen Mangnus
    • Jeroen Candel
    Comment
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News & Views

  • Agriculture accounts for the largest proportion of green and blue water consumption. Increasing availability of datasets and models for assessing global crop water footprints can pave the way towards more sustainable allocation of limited green and blue water resources worldwide.

    • Oleksandr Mialyk
    News & Views
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Research Briefings

  • We devised two deployment schemes for renewable-fuelled plant factories to meet the dietary vegetable demand across China’s 369 city-level regions. Our results indicate that renewable-fuelled plant factories ensure sufficient vegetable supply and offer multifaceted benefits, such as land saving and pollutant reduction, but also increase greenhouse gas emissions, highlighting the need for a low-carbon transition.

    Research Briefing
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Reviews

  • Unintended and undesirable consequences can hinder policymaking. This Perspective explores how anticipatory governance can reduce ignorance, manage errors and avoid imperious immediacy when shaping future technological innovation to support more sustainable food systems transformations.

    • Daniel Mason-D’Croz
    • Cody Kugler
    • Mario Herrero
    Perspective
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Research

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Amendments & Corrections

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