I’m in the non-apocalyptic camp of climate change believers. I don’t believe even the worst case will make the world uninhabitable. Let’s say that’s a 5% likelihood scenario of maybe 90% species loss and even 90% human population decline. But what do those numbers *mean*?
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Ecology doesn't work that way. Each and every species are dependent on each other. If, for example, the bees would go extinct, then there won't be no fruits. We can't know for sure what will happen, but it won't be pretty.
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For example, re-introduction of wolves is causing a trophic cascade of ecological change, including helping to increase beaver populations and bring back aspen, and vegetation.
yellowstonepark.com/things-to-do/w
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Sure, but those are low-level disruptions. At broad collapse scenarios, you are not talking specific ecoweb patterns but evolutionary bottleneck potential. Earth has survived several 90% extinction events. We can predict 10% will survive, just not which 10%.
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Why do you not call that "apocalyptic"?
Also, note the majority of species are not yet even identified. So quantification such as 90% are not meaningful.
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Life does not end. Evolution has enough of a foothold to get going again. The 90% figure I have seen is with reverence to historic mass extinction events.
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