By Andi Anderson
A new global study published in Nature reveals that climate change is steadily reducing global crop yields—even as farmers try to adapt.
The study, led by researchers from the Climate Impact Lab, warns that every 1°C rise in temperature could cut global food production by an average of 120 calories per person daily. That’s about 4.4% of today’s food intake.
Solomon Hsiang, senior author and professor at Stanford, explained, “If the climate warms by 3 degrees, that’s like everyone giving up breakfast.” With over 800 million people already facing food insecurity, this drop in yields could deepen global hunger.
The study examined over 12,000 regions in 55 countries, analyzing six staple crops: corn, rice, wheat, barley, soybeans, and cassava.
While farmers are adjusting by changing crop types, planting times, and fertilizer use, these efforts are projected to offset only one-third of the damage by 2100.
U.S. agriculture, especially in the Midwest Corn Belt, is expected to face major losses. “You do start to wonder if the Corn Belt is going to be the Corn Belt in the future,” said lead author Andrew Hultgren from the University of Illinois.
In wealthier regions, yields may fall by 41%, and by 28% in the lowest income areas. The study found that rice may slightly benefit from warming due to warmer nights, but most crops, including soybeans and wheat, are expected to suffer.
By 2050, crop yields could drop by 8%, regardless of emissions levels, due to the long-term effects of existing greenhouse gases.
Researchers are working with the United Nations to help governments target at-risk farming communities. Hsiang emphasized, “If you’re letting the climate depreciate, the rest of it is a waste.”
Photo Credit: getty-images-elhenyo
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