The vast majority of humanity has always lived in regions where the average annual temperatures are around 6C (43F) to 28C (82F), which is ideal for human health and food production. But this sweet spot is shifting and shrinking as a result of manmade global heating, which drops more people into what the authors describe as “near unliveable” extremes.

絕大多數(shù)人類(lèi)一直生活在年平均氣溫在6攝氏度至28攝氏度左右的地區(qū)，這對(duì)人類(lèi)健康和食品生產(chǎn)是理想之選。但是，由于人為的全球升溫，這個(gè)"甜蜜地帶"正在移動(dòng)和縮小，讓更多的人陷入作者稱(chēng)作“幾乎不宜居住的”極端環(huán)境中。