< p > 100年不是很长远。增加的二氧化碳不会奇迹般地消失在一个世纪之后,但会加剧全球变暖。(这只是假设人类停止燃烧化石燃料了。)有各种各样的反馈效应,发挥作用在某种程度上,如果他们还没有。< / p > < p >的一个例子,很多的二氧化碳溶解在海洋风,水温和溶解性成反比。随着海洋变暖由于人为的二氧化碳在大气中,它变得不那么能够作为二氧化碳水槽,并最终将释放它的一些现有的二氧化碳,导致进一步变暖。海洋混合时间(表面和深海之间)是在1000年,所以无论今天启动继续发生。海洋变暖还可能触发释放甲烷包合物:< a href = " https://en.wikipedia.org/wiki/Clathrate_gun_hypothesis " rel = " nofollow noreferrer " > https://en.wikipedia.org/wiki/Clathrate_gun_hypothesis < / > < / p > < p >然而,我们真的没有推理的长期影响,因为我们有相当密切的平行距离地球的地质历史:二叠纪-三叠纪灭绝事件:< a href = " https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extinction_event " rel = " nofollow noreferrer " > https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extinction_event < / >一个主要的原因是理论主要vocanic喷发(西伯利亚陷阱)发生在一个区域的煤层,纵火。这当然增加了大量的二氧化碳在空气中,就像人类的化石燃料的使用。< / p > < p >的假说是当前气候变暖(和未来的气候变暖已经是“烤”已经释放的CO2)将引发不可阻挡的反馈效应。 Not quite a runaway "Venus Effect" (that's probably impossible on Earth), but one that causes mass extinctions. Some people think that humans would survive those mass extinctions. I doubt that*, myself. Too many people live lives divorced from the natural world (thinking for instance that food comes from supermarkets & fast-food joints), and so fail to appreciate just how strongly human survival depends on the existence of the global ecosystem.
*Of course this is opinion. The only way to test it (other than computer models) is to perform the experiment, which is analogous to checking whether a gun is loaded by pointing it at your kid and pulling the trigger :-)