What has this got to do with anything? The planet used to be hotter, agreed. But the species alive then were completely different, adapted to living in those c

What has this got to do with anything? The planet used to be hotter, agreed. But the species alive then were completely different, adapted to living in those conditions. The species alive now (including us!) can thrive in current climatic conditions. A drastic change in a short span of time will lead to a mass extinction. Unless you think a mass extinction event is ok because it happened millions of years before humans existed? It happened to the dinosaurs so it's no big deal if it happens to most living creatures alive today?