Climate change is draining nutrition from our crops
As temperatures rise, our foods hold fewer vitamins and minerals
It is easy enough to imagine the effects of climate change, how a warming world can lead to longer and hotter dry spells, as well as greater storms and cyclones. But sometimes I run across a scientific paper that surprises me. Back in 2023, I was surprised to find climate change is so profound that it is actually affecting the foundations of our buildings.
And just this last week I was surprised to find that not only are climate driven storms and droughts affecting crop production, but climate change is actually affecting the very crops themselves. It turns out increased temperatures, higher levels of atmospheric CO2, and other consequences of global heating are draining nutrition from our food. Our beans, potatoes, and turnips now have fewer vitamins and essential nutrients, such as iron and potassium, because we have made our world warmer with our factories and tailpipes.
These are the conclusions of a newly published paper. Researchers from Qatar University performed a meta-analysis of previously published papers, primarily from 2005 through 2025, that looked into the question of how the nutrition of crops is affected by climate change. The Qatari scientists took all the individual findings—how global heating affected individual crops such as corn or potatoes for example—and brought them together to give bigger picture of climate change and agriculture. They published their findings May 31st in the journal Agriculture.
How climate change changes nutrition
Rising temperatures speed up plant respiration, which speeds up the loss of carbon, and which in kind accelerates the loss of nutrients. Higher temperatures also shorten seasonal and plant life stages, such as flowering and grain development; this gives plants less time to accumulate nutrients. Higher temperatures make transporter proteins less effective at moving nutrients such as iron, zinc, and magnesium within plants.
Plants reduce the amount of water they pull up from the ground during droughts, which are increasing and worsening because of global heating. As they are pulling up less water from the ground, plants subsequently reduce the nutrients they pull up from the soil. Drought also reduces root growth, limiting a plant’s ability to pull nutrients from the soil. It’s not only drought but another consequence of global warming, increased precipitation, that can also reduce the nutritional quality of crops, as heavy rainfall leeches nutrients from soils. And roots stressed by too much water lose the ability to accumulate soil nutrients.
