What is ‘corn sweat’ and how does it exacerbate heat waves?

A phenomenon known as “corn sweat,” resulting from evapotranspiration, may worsen the extreme heat affecting much of the U.S. during summer. As corn and soybean crops release moisture into the atmosphere, they can increase local humidity, making high temperatures feel even more dangerous, especially in the Midwest’s Corn Belt, where heat alerts are in effect.

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