At such intense heat and humidity, humas are unable to regulate their body temperatures, which leads to hyperthermia and ultimately death. Which is really not cool.
Of course, this doesn't need to happen. Researchers also studied how a reduction in greenhouse gas emission could change the course of human history. The Smithsonian reports as long as humans curtail greenhouse gas use just enough that worldwide temperatures don't rise 4.3 degrees, it's all good.
Otherwise, the next century is going to be hotter than Ryan Gosling saying, "Hey, girl," and way less funny.
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