I'm not sure what you mean by "not alarming". I mean, the world itself will be fine. On the other hand, 11,000 years ago half of the UK was under a permement i

I'm not sure what you mean by "not alarming". I mean, the world itself will be fine. On the other hand, 11,000 years ago half of the UK was under a permement ice sheet. If we end up at a similar extreme to 11,000 years ago compared to now (probably in the other direction) large amounts of the world will become uninhabitable.