Unless climate change can be greatly minimized, rising temperatures will disrupt food production around the world and potentially alter the way we eat, a new study finds.
The continued buildup of greenhouse gases in the atmosphere could imperil "nearly one-third of global food crop production and over one-third of livestock production" by 2081-2100, the peer-reviewed study, published in May by researchers at Aalto University in Espoo, Finland, concludes.
The findings put a fine point on what climate scientists have warned for decades: that climate change will render certain parts of the globe incapable of producing food for the people who live there.
The study notes that if greenhouse gas emissions continue at their current rate, the most vulnerable areas will be South and Southeast Asia, as well as Africa's Sudano-Sahelian zone. But the vast majority of land on earth will be affected.
There is hope, however: If the world's nations are successful in their goal of limiting global mean temperatures to warming between 1.5° and 2°C, the impacts on food production will be lessened.
Numerous other studies have looked at how climate change will affect individual crops or growing areas, and some have concluded that global warming is already wreaking havoc on food production. Others make the case that dietary changes are imperative to prevent temperatures from rising even further.
The following is a sample of the growing body of research on how climate change will affect the world's diet. As certain food industries feel the impact, their products won't go away, but prices could rise and change behaviors.
Wine
|
|
A worker picks grapes at a vineyard in California's Napa
Valley. (Robert Galbraith/Reuters)
|
Previous studies have concluded that rising temperatures will shrink the area in California's Napa Valley and other vaunted wine-growing regions in the U.S. that will be able to continue producing premium grapes.
"Over the next century, the area suitable for premium wine grape production is likely to shrink and shift," a study by the Union of Concerned Scientists concluded. "According to the higher emissions projections, premium wine grapes could only be grown in a thin strip of land along the coast of California, with premium wine-producing regions shifting northward to coastal Oregon and Washington."
Beer
|
|
Beer mugs in Abensberg, Germany. (Michael Dalder/Reuters)
|
"Beer is the most popular alcoholic beverage in the world by volume consumed, and yields of its main ingredient, barley, decline sharply in periods of extreme drought and heat," the study's authors wrote.
Depending on the severity of drought and rising temperatures, barley yields are forecast to decline anywhere from 3 to 17 percent annually. As a result, the Chinese and American researchers concluded, beer prices could double in some parts of the world by the end of the century.
Coffee and chocolate
|
|
Coffee beans in the window of a store in Dublin, Ireland.
(Artur Widak/NurPhoto via Getty Images) |
An April study found that coffee production in Ethiopia will be especially vulnerable. "We conclude that depending on drivers of suitability and projected impacts, climate change will significantly affect the Ethiopian speciality coffee sector and area-specific adaptation measures are required to build resilience," wrote the authors of the study, published in Nature.
Cocoa beans, which are used to make chocolate, face a similar threat due to rising temperatures and drought. A 2018 study published in the journal PLOS One concluded that "drought effects on cocoa agroforestry could be a ‘canary in the coal mine’ warning of problems to come both in agriculture and in semi-natural and natural vegetation due to increased intensity and frequency."
Meat
|
|
Cattle at a ranch in Tomales, Calif.
(Justin Sullivan/Getty Images) |
Citing deforestation that is carried out to create grazing land for livestock, the Intergovernmental Panel on Climate Change included a section in its landmark 2019 special report that declared that the prospect of eating less meat could "present major opportunities for adaptation and mitigation while generating significant co-benefits in terms of human health."
“We don’t want to tell people what to eat,” Hans-Otto Pörtner, an ecologist who co-chairs the IPCC’s working group on impacts, adaptation and vulnerability, told Nature. “But it would indeed be beneficial, for both climate and human health, if people in many rich countries consumed less meat, and if politics would create appropriate incentives to that effect.”
Beef is, by far, one of the worst food sources in terms of its impact on climate change, in part because of the methane gas that cows produce. Beef production generates 60 kilograms of greenhouse gas emissions per kilogram of meat, more than double that of lamb, which ranks second, Forbes reported.
Wheat and corn
|
|
A damaged corn crop in Kansas in 2012. (Jeff Tuttle/Reuters) |
A 2019 study published in Science Advances found that unless global mean temperatures can be kept from rising, major droughts will affect 60 percent of areas where wheat is grown. That is dramatically higher than the current 15 percent of wheat-growing areas affected by drought conditions. The backdrop to the rise in the prevalence of drought, the study noted, is that demand for wheat was projected to increase 43 percent from 2006 to 2050.
A similar dynamic is at play with corn, 30 percent of the world's supply of which is grown in the U.S. Weather patterns resulting in drought or widespread flooding that can overlap with the growing season for corn are projected to reduce yields by 20 to 40 percent over the decade spanning 2046-2055, a study released in April concluded.
"That poor weather can take the form of extremes in temperature such as cold snaps or heat waves during the growing season," the authors wrote. "It can also be expressed as excessive variation in rainfall resulting in drought or flood, including floods before a crop’s growing season that prevent the planting of that crop in the first place."
Almonds
|
|
A field of dead almond trees next to a field of growing almond
trees in California's Central Valley in 2015.
(Lucy Nicholson/Reuters) |
Yet, as with many other crops, climate change may present the opportunity for almonds to be grown in latitudes currently too cold to support them.
Researcher Lauren Parker of the University of California, Davis, is studying whether, as temperatures continue to rise, almond trees could thrive in states like Oregon and Washington.
"Under climate change, what we anticipate is seeing a reduction in the frost risk even for almonds, which bloom pretty early in the year," Parker told Yale Climate Connections.
Pet food
|
|
Fly larvae waiting to be harvested at a farm near Cape Town, South
Africa. (Mike Hutchings/Reuters) |
In part, that's due to the rise in "premium" pet food, according to the study, which more closely mirrors a meat-heavy human diet. At present, pets consume roughly 20 percent of the meat and fish in a given country. But what if humans changed what they fed their pets, substituting insect protein for meat? While that idea may sound lifted from a dystopian science fiction film, it's already happening in many countries.
In fact, a 2017 study recommended that insect protein replace that of meat for humans, too, as a way to fight climate change, though with some caveats attached.
"Insect production has great potential with respect to sustainably providing food for the growing population," the study authors wrote. "However, further technological development of this sector and monitoring of the effects of these developments on the environmental impact of insect production are needed."
Links
- Climate change risks pushing one-third of global food production outside the safe climatic space
- The consequences of climate change are happening now, studies show
- Up to 40% of Losses from Frost Damage at French Vineyards Are Uninsured
- Climate change to blame for devastating French wine spring
- Climate Hot Map: Global Warming Effects Around the World
- Decreases in global beer supply due to extreme drought and heat (pdf)
- Record-high temperatures scorch Western states in preview of climate change future
