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Advocates: Global veganism offers sustainable, nutritious alternative

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Tuesday, October 8, 2024   

As worldwide demand for meat and dairy continues to grow, so does evidence showing animal agriculture, as currently practiced, is harming the environment.

Advocates are making the case for widespread adoption of a vegan diet, avoiding animal products, as better for individual health and the environment. It is estimated between 11% and 20% of all greenhouse-gas emissions worldwide come from animal agriculture and livestock grazing has degraded up to 20% of the world's pastures.

Marco Springmann, research fellow in climate change, food systems and health at University College-London and senior environment and health researcher at Oxford University, said a vegan diet would bring a number of benefits.

"Adoption of a completely plant-based, or vegan, diet has many health, environmental and even cost benefits," Springmann explained. "If more people adopted such a diet, it would result in general benefits for climate change, land use as well as population health."

Maryland is home to more than 160,000 cattle, with a $91 million beef cattle industry and a $185 million dairy industry.

Veganism has attracted more attention in recent years, thanks in part to advancements in lab-grown meat technology; however, it's still not a very popular diet, with surveys indicating fewer than 5% are vegan. The prospect of billions of people deciding to eliminate animal products from their diets seems unlikely. Feeding a vegan world would require growing many more plants than we do now.

Springmann pointed out there is enough cropland to meet the nutritional needs of Earth's population through plants alone.

"At the moment, we feed about a third of all grains to livestock," Springmann emphasized. "Which means that if we wouldn't have so much livestock anymore, we actually would have lots of cropland available to grow other things in addition to not having, for example, all this need for pastures anymore."

He said if we shifted to a healthy plant-based diet, then we would still have a net reduction in global cropland use of about 10%.

Benefits of a global vegan diet include an estimated 3 billion hectares of land freed up for other purposes and a 6 billion-ton reduction of greenhouse-gas emissions annually. It is also estimated more than 2 million additional hectares of tropical rainforest would be preserved each year. Springmann added another benefit is cost.

"If you recompose your diet to something that is not made up of those processed products but is just generally healthy, then we calculated that purely on the cost of ingredients, a plant-based diet might actually be much cheaper," Springmann stressed. "Up to a quarter or even a third in high-income countries."

This story is based on original reporting by Seth Millstein at Sentient.


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