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    "At SCOOP we don’t demand exclusivity and actively encourage farmers to find new and better markets for themselves." Pic: Cotswolds farmer by David George

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    A worker handles wheat delivered to a milling facility in Chouf, Lebanon. Pic: Hasan Shaaban/Bloomberg

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    "At SCOOP we don’t demand exclusivity and actively encourage farmers to find new and better markets for themselves." Pic: Cotswolds farmer by David George

    Paying farmers 75p for each £1 consumers spend on their produce

    A worker handles wheat delivered to a milling facility in Chouf, Lebanon. Pic: Hasan Shaaban/Bloomberg

    Bank of America: Food shocks will destabilise ESG

    "World leaders should see hunger as a global problem urgently requiring a global solution"

    The Economist: The coming food catastrophe

    Pollutants cited by the researchers as increasing obesity include BPA, which is widely added to plastics. Photograph: Jonathan Brady/PA

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    President Joe Biden has called for ideas to help end hunger

    Call for ideas: White House seeks to end hunger in the US by 2030

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    A pre-school age girl helps her parents pick out veggies in the produce section at the grocery store. She is reaching for a red pepper.

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    if it seems too cheap, it is too cheap. There’s something wrong somewhere along the way.”

    ‘Why’s chocolate so cheap?’: Aussies call for transparency

    Ukraine could lack seeds for grain crops for years

    Ukraine could lack seeds for grain crops for years

    Grains of wheat pictured at a mill in Beirut, Lebanon, March 1, 2022. REUTERS/Mohamed Azakir

    IMF, World Bank, WFP and WTO urge coordinated action on food security

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    Bank of America: Food shocks will destabilise ESG

    "World leaders should see hunger as a global problem urgently requiring a global solution"

    The Economist: The coming food catastrophe

    Pollutants cited by the researchers as increasing obesity include BPA, which is widely added to plastics. Photograph: Jonathan Brady/PA

    Environmental toxins worsen obesity pandemic

    President Joe Biden has called for ideas to help end hunger

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Home Topics Sustainability

Breakthrough study assesses water impact of US diets

Smashed avocado is sucking up precious water

by Jack Groves
April 19, 2021
in Environment, Research, Agriculture
Reading Time: 2 mins read
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Breakthrough study assesses water impact of US diets

Pic: Tony Pham

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Is your diet using more water than it should? If you’re in the States and eat a lot of beef, almonds, walnuts, cashews, lemon juice, avocado, asparagus, broccoli and cauliflower, then, yes.

A new study published in Nature Food shows people eating a diet like this are responsible for almost 40 per cent of the country’s water usage for food production.

It’s an important issue given that the UN says freshwater available in the world has gone down by more than 20 per cent, per person, over the last 20 years. It’s a precious resource – less than one per cent of water on earth is fresh and usable. And 41 per cent of the water we use is not sustainable – in other words it can’t be replenished.

The new study Individual US diets show wide variation in water scarcity footprints says agriculture accounts for 80 per cent of global freshwater consumption, so this impact should be a key consideration of sustainable diets.

“Swap in peanuts and sunflower seeds, peas, chicken and soybeans”

It creates a water scarcity footprint measuring the water-use of US diets, and taking into account regional variations in water scarcity.

The researchers recommend swapping out high water usage foods with others like peanuts and sunflower seeds, peas, brussels sprouts, cabbage and kale, and replacing some beef with chicken, pork or soybeans.

The study looked at the irrigation water demands of 160 crops, taking into account natural water scarcity. It then created a water scarcity footprint for each crop.

The individual crop footprints were aggregated and linked to the diets of 16,800 Americans, from the federal National Health and Nutrition Examination Survey.

Understanding the water usage needed for food, along with carbon footprint and soil quality, is important when looking at the environmental impact of food choices.

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Jack Groves

Jack Groves

Jack Groves is a founding contributor to Quota. He views food systems as fundamental to business success and human progress. He is endlessly curious about the people in food systems, their skills and culture. Contact JackGroves@quota.media with news and views.

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