Want to lower your environmental impact? Go vegan. That’s one idea researchers uncovered in what The Guardian described as the most comprehensive analysis thus far of farming’s impact on Earth. University of Oxford scientist Joseph Poore, who led the study, told The Guardian, “A vegan diet is probably the single biggest way to reduce your impact on planet Earth, not just greenhouse gases, but global acidification, eutrophication, land use, and water use. It is far bigger than cutting down on your flights or buying an electric car.”
“Animal product-free diets…deliver greater environmental benefits than purchasing sustainable meat or dairy,” according to Oxford’s statement on the study published today in the journal Science. Scientist Thomas Nemecek of Swiss agricultural research group Agroscope joined Poore to create a database of close to 40,000 farms in 119 countries to assess environmental impacts of 40 major foods representing 90 percent of what we eat.
They discovered that meat and dairy generate 60 percent of greenhouse gas emissions from agriculture and use up 83 percent of farmland — but offer just 37 percent of protein and 18 percent of calories, The Guardian reported. Without dairy and meat consumption, global farmland use could be slashed by over 75 percent.
The scientists also uncovered variability in producing the same food: for example, high-impact beef producers raising beef cattle on deforested land use 50 times more land and create 12 times more greenhouse gases than low-impact beef producers raising cows on natural pastures. But there’s still a sharp comparison between beef and plant protein like peas: even low-impact beef generates six times more greenhouse gases and uses 36 times more land.
You might think grass-fed beef has a low environmental impact, but the researchers discovered the product’s impact was still higher than that of plant-based foods. Poore told The Guardian, “Converting grass into [meat] is like converting coal to energy. It comes with an immense cost in emissions.”
Many food experts praised the study. The University of Edinburgh’s Peter Alexander told the Guardian he was impressed but said, “There may be environmental benefits, e.g. for biodiversity, from sustainably managed grazing and increasing animal product consumption may improve nutrition for some of the poorest globally. My personal opinion is we should interpret these results not as the need to become vegan overnight, but rather to moderate our [meat] consumption.”
Via The Guardian
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