The way food is grown around the world threatens 24,000 of the 28,000 species that are at risk of extinction, according to a report published Wednesday that calls on world leaders to urgently reform the global food system.
Plants and animals are dying out at a rate that is at least tens — if not hundreds — of times faster than the average over the past 10 million years, according to the report, which was published by the United Nations Environment Program (UNEP), British think tank Chatham House, and animal welfare organization Compassion in World Farming. The decline has mostly been driven by people destroying natural ecosystems to make space for cropland and pastures.
But world leaders could slow the accelerating loss of the planet’s wildlife with simple steps: protecting more land, farming with fewer pesticides and monocultures, and shifting diets from meat towards plants. The scope of the first two solutions, the authors warned, depends on how much people change their diets and stop throwing food away.
“If our demand for food continues to increase, the more intensively we have to use the land that is left,” said Tim Benton, an ecologist at the think tank Chatham House and co-author of the report. “It is about changing the way that we relate to food.”
Feeding the World
The food system sits at the heart of four worsening global crises: climate, extinction, hunger and obesity. With more than a third of the world’s land used for agriculture, experts are grappling with how to feed a growing population more food that is healthy — while at the same time killing less wildlife and emitting fewer greenhouse gases.
For decades, environmental activists have held up organic farms, which avoid synthetic fertilizers and pesticides, as a nature-friendly alternative to conventional agriculture. Some farmers have turned to regenerative practices that store carbon dioxide in soils and make crops more resilient to storms and droughts.
But ecologists say there is a catch.
The Organic Dilemma
Because organic and regenerative farms typically yield less food per hectare than industrial farms, sustainable farmers need to use more land if they are to grow the same amount of food.
A 2019 study published in the journal Nature Communications found that adopting organic farming across the UK would, in fact, lead to more greenhouse gas emissions. Lower yields at home would be offset by imported food from croplands that would expand onto natural ecosystems.
In the US, a detailed lifecycle assessment of a regenerative farm found that its greenhouse gas emissions for each kilogram of meat were 66% lower than conventional alternatives, but took up 2.5 times more land, according to a study published in December in the journal Frontiers in Sustainable Food Systems.
Experts say there isn’t enough land to feed the world and its growing appetite for meat through sustainable farms alone, even if they were built on marginal lands like degraded cropland.
The only thing that will allow us to farm in a sustainable way is changing our demand for food, said Benton. “That sounds horribly elitist, middle-class, ‘let’s all go vegan’,” he said. But it could free up demand for land that could then be satisfied by sustainable farms.
Beef and a few other red meats, for instance, supply 1% of the world’s calories but account for 25% of the emissions that come with changing how land is used, according to a study published in the journal Nature in January. To produce the same amount of protein as tofu, beef uses up 75 more times land.
In countries like Brazil and Indonesia, foreign demand for commodities drives companies to raze rainforests to grow soy for cattle and oil palm for cooking and use in processed foods.
In many cases, the food is not even eaten. About a third of all food made is lost during production or wasted.
Cheap, Unhealthy Food
The charge sheet ecologists have against industrial agriculture is long: destroying forest homes of endangered mammals like orangutans; killing bees that farmers rely on to pollinate crops; chopping trees that suck CO2 out of the atmosphere; and degrading soils that future generations will need to feed themselves.
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