求翻譯：Second, poverty is central to the problem. Four billion of the planet’s six billion people face deprivation. As they demand adequate heat and food, humanity’s environmental footprint will grow. Our challenge is to accommodate this mass ascent from poverty without wrecking the natural systems that make life possible.是什么意思？

待解決 懸賞分：1 - 離問題結(jié)束還有