[bruce511]

So I'll preface this by saying that it's my belief climate change is real, that it's being accelerated this time by human behaviour etc.

However I would suggest that it is not an existential threat to humanity. It IS a threat to an enormous number of individuals (literally billions) but humans will continue to populate the earth long after the climate has changed.

Humans have proved to very adaptable, living sustainably in the deserts of the Sahara as well as the ice of Alaska. I don't think we'll see the decision of humanity here.

Life as we know it? Civilization? Sure I can see cataclysmic change there over the next 100 years. Then again life now is completely different to 100 years ago, so that's no surprise.

[Sparkyte]

One of the many reasons we are doing a lot of ice age hole boring. Get a clear picture of the hot/cold and wet/dry periods. The problem is that it can only peer into that biom.

The planet has been hotter and there was still wildlife. I am not going to rule out climate change as a problem.

But I am probably going to point out increased commercial farming in Africa as a potential culprit. The use of fertilizers are an issue with algae and bacteria growth.