Climate change threatens food production


Tyler Chalfant | August 14th, 2019

A report released Thursday by the Intergovernmental Panel on Climate Change warned that climate change will make crops scarcer and less nutritious. Even as the global population rises, the number of people without enough to eat has been shrinking in recent decades, but rising temperatures, increased flooding, and more extreme weather patterns could reverse that progress.

Staple crops like wheat have been found to offer less protein, iron, and other important nutrients when grown at high carbon dioxide levels. A study earlier this year found that the world is already losing 35 trillion calories from crops each year. That amounts to about 1% of all food calories, or enough to feed 50 million people. 

The effects of climate change vary by region, however, with the greatest loss of food production happening in Europe, Southern Africa, South Asia, and Australia. While Illinois has seen an 8% production in corn yield, Iowa has actually seen gains in production due to climate change, according to Deepak Ray, a senior scientist with the University of Minnesota. 


A part of the problem is that food production contributes to the very process that is harming it. Depending on the accounting method, the industry contributes somewhere between a quarter and a third of global greenhouse gas emissions. That footprint can be reduced by farming in ways that are better for the land, including limiting the use of fertilizers and planting crops that add carbon to the soil, rather than releasing it into the atmosphere.

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