从气候变化到持续存在的大流行病以及其它问题，当今世界面对的问题越来越复杂多变。
From climate change to the ongoing pandemic and beyond, the issues facing today's world are increasingly complex and dynamic.
认为气候变化问题非常严重的人群比例也有了轻微提升，从2009年调查时的64%上升到了今年的68%。
The number of people rating climate change as a very serious problem has risen slightly, from 64% when the poll was last conducted in 2009, to 68% this year.
让我们从最为危急的问题谈起：气候变化。
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