how do you think life on earth will end?

[Regina]

I can't see Global Warming actually ending life on the planet (unless it suddenly spiraled so out of control that it got too hot for us overnight). It will probably end up causing larger natural disasters on a scale of which countries can't cope or recover from. I think it'll end up wiping out entire countries (politically and economically, not literally) and we'll end up going into an era of post-apocalyptic lawlessness with survival of the fittest. You've also got the increasing shortage of resources that'll encourage that sort of society to appear. Eventually we'll probably kill so many of ourselves off that the pressure on resources goes away and we can resume some sort of civilisation building again.

Humans are so spread out across the planet that it's going to take something so globally devastating and final to completely wipe us out. You could possibly get local extinction from a massive natural disaster, let's say the Sahara region gets such a severe drought that everyone there either dies or leaves. Globally though, It's going to be a meteor impact, dramatic change to the Earth climate or conditions, or the sun expanding before we're going to die out completely.