With very high certainty (with some slight chance that Earth becomes the next Venus and evolution here ends for good). Keep in mind though that a mass extincti

With very high certainty (with some slight chance that Earth becomes the next Venus and evolution here ends for good). Keep in mind though that a mass extinction is part of the process of accelerating evolution. You don't get a quick adaptation without a strong selection process. Edit: By 'slight chance' I mean very much near zero btw. However I'm skeptic enough of climate models to know that they aren't good enough to include all the domino effects we've never seen. The Permiam-Triassic boundary saw tremendous forest fires along with abrupt methane release, and that didn't include a species actively releasing enormous amounts of fossilised carbon. I'd imagine that if a few worst case scenarios came together - finding more fossil fuel sources, burning up all of it and causing unstoppable forest fires in all large remaining forests, it could happen. http://news.nationalgeographic.com/news/2013/13/130729-runaway-greenhouse-global-warming-venus-ocean-climate-science/ http://news.nationalgeographic.com/news/2013/13/130729-runaw...