Originally posted by ace00
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Also, I don't really get this thing about the Earth being 4.54 billion years old and survived fine in the past so what's the problem. It's not the Earth that we have to worry about, it's the Humans. Humans have also survived extremes in the past, but our ancestors had a couple of advantages. Firstly, they knew how to survive from day to day, where to gather food and how to hunt animals, and loads of other skills which are only remembered now in the "Third World".
Secondly, there were a tiny fraction of the number of people we have now. Here's a graph from Wiki. The world's population has nearly trebled in size since 1950. If the climate changes to the point where crops get damaged regularly, or pests spread to zones they never affected before, or huge areas become uninhabitable, then it won't just be a case of migrating to the next valley to find food. It could all get very, very messy. Already has in some places.
It always seems to me that it's got to be worth organising a bit of self-sufficency, grow some food, generate some power, harvest some rainwater etc. Not to "save the environment" but to prepare for a time when the environment isn't going to be able to save us.
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