There is just too many of us. I find it interesting that the state of the human population and the demands it puts on our one and only home is very rarely discussed. No one wants to touch the subject. As whether climate change is man made or not is a mute point. It will always change, the rate and degree will also vary. In the past, our ancestors had the opportunity to migrate. Why? It was because the population was minimal and the space and resources were available.