Will global warming endanger the U.S. corn belt, a key source of calories for the growing global population (?)
It would be more accurate to say that American corn is a major source of calories for American internal combustion engines. It has virtually nothing to do with feeding the world. Only 17% of the crop is exported, mostly to Mexico and Japan.
Africa has a variety of climates but Africans mostly live on self-grown corn in the form of "mealie pap". They don't rely on American corn.
And the experiment described below is stupid. To expose a cultivar designed for a cold climate to unusually high temperatures is simply irrelevant. Corn is grown all around the world in a variety of climates, mostly warm. Some cultivars grown in India, for instance, are very heat tolerant -- up to 35° C.
So in the event of global warming, farmers would just have to order seed of a more heat tolerant cultivar. If the Midwest warmed up a bit, use of tropical cultivars would probably INCREASE production
The article below also ignores other factors of production. CO2 is a plant food so more CO2 in the air would also increase corn production. And a warmer world would be more rainy, which again favours plant growth. Farmers might have to look more to their drainage but that is a lot better than suffering drought, which is the current most common problem for corn farmers. Corn likes a lot of water.
So if you look at the full picture, a warmer world would be most likely to lead to a GLUT of corn, not a shortage. It never ceases to amaze me how dishonest Warmist articles are. Is there such a thing as an honest Warmist?