Major study also detects huge changes to farming are needed to avoid destroying Earths ability to feed its population
Huge reductions in meat-eating are essential to avoid dangerous climate change, according to the most comprehensive analysis yet of the food system’s impact on the environment. In western countries, beef consumption needs to fall by 90% and be replaced by five times more beans and pulses.
The research also finds that enormous changes to farming are needed to avoid destroying the planet’s ability to feed the 10 billion people expected to be on the planet in a few decades.
Food production already causes great damage to the environment, via greenhouse gases from livestock, deforestation and water deficits from farming, and vast ocean dead zones from agricultural pollution. But without action, its impact will get far worse as the world population rises by 2.3 billion people by 2050 and global income triples, enabling more people to eat meat-rich western diets.
This trajectory would smash critical environmental limits beyond which humanity will struggle to live, the new research indicates.” It is pretty shocking ,” said Marco Springmann at the University of Oxford, who led the research team.” We are actually risking the sustainability of the whole system. If we are interested in people being able to farm and feed, then we better not do that .”
” Feeding a world population of 10 billion is possible, but only if we change the way we feed and the style we produce food ,” said Prof Johan Rockstrom at the Potsdam Institute for Climate Impact Research in Germany, who was part of the research team.” Greening the food sector or eating up our planet: this is what is on the menu today .”
The new study follows the publication of a landmark UN report on Monday in which the world’s leading scientists advised there are just a dozen years in which to keep global warming under 1.5 C, beyond which even half a degree will significantly worsen the risks of drought, deluges and extreme hot. The report said feeing less meat and dairy was important but said current trends is now in the opposite direction.
The new research, published in the publication Nature, is the most thorough to date and blended data from every country to assess the impact of food production on the global environment. It then looked at what could be done to stop the looming food crisis.
” There is no magic bullet ,” said Springmann.” But dietary and technological change[ on farms] are the two essential things, and hopefully they can be complemented by reduction in food loss and trash .” About a third of food created today never reaches the table.
The researchers saw a global switching to a “flexitarian” diet was needed to keep climate change even under 2C, let alone 1.5 C. This flexitarian diet entails the average world citizen needs to eat 75% less beef, 90% less pork and half the increasing numbers of eggs, while tripling intake of beans and pulsings and quadrupling nuts and seeds. This would halve emissions from livestock and better management of manure would enable further cuts.
In rich nations, the dietary changes necessitated are ever more stark. UK and US citizens need to cut beef by 90% and milk by 60% while enhancing beans and pulsings between four and six periods. However, the millions of people in poor nations who are undernourished need to eat a little more meat and dairy.
Reducing meat consumption might be achieved by a mix of education, taxes, subsidies for plant-based foods and changes to school and workplace menu, the scientists said.
To halt deforestation, water deficits and pollution from overuse of fertiliser, profound changes in farming practises are needed. These include increasing crop yields in poorer nations, more universal water storage and far more careful utilize of fertilisers.
” I was surprised by the fact we need a combination of very ambitious options ,” Springmann said.” We truly need to push it to the edge of what is possible .”
All the diet and farming options are already being implemented in somewhere in the world, said Springmann. In the Netherlands and Israel, fertilisers and water are being better use, while big cuts in meat intake are being ensure among young people in some cities.
But a global change is needed, he said:” I think we can do it, but we really need much more proactive governments to provide the right framework. People can make a personal difference by changing their diet, but also by knocking on the doors of their politicians and saying we need better environmental regulations – that is also very important. Do not let politicians off the hook .”
Prof Tim Benton at the University of Leeds, who was not part of the research team, said:” Ultimately, we live on a finite planet, with finite resources. It is a fiction to imagine there is a technological answer allowing us to produce as much food as we might ever want, allowing us to overeat and hurl food away .” He said the environmental burden of the current food system” undermines the ability of future generations to live on a stable and ecologically rich planet “.
Prof Peter Smith at the University of Aberdeen, who was also not part of the research team, said:” We know food choices are very personal, and that behaviour change can be difficult to encourage, but the evidence is now unequivocal- we need to change our diets if we are to have a sustainable future. The fact that it will also induce us healthier attains it a no-brainer .”
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