According to a brand-new study published by the Proceedings of the National Academy of Sciences this week, large portions of the most densely populated parts of the planet, including much of the eastern and central United States, may be rendered uninhabitable or nearly so within a few decades, as a consequence of anthropogenic global warming projected through the year 2100. Reckoning in terms of so-called wet-bulb temperatures — a measure of temperature in terms of the human body’s capacity to thermoregulate — as little as a 1.5° Celsius rise in average global temperatures would result in significant temperature increases in parts of Sub-Saharan Africa, the Indian Subcontinent, and southeastern China. With a 3° Celsius increase, the affected areas would not only broaden in Africa and Asia, they would also begin to crop up in South America and south- central United States. A 4° Celsius rise would create a hot zone in most of the eastern United States, at least as far north as New York and Chicago.
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