I don't care whether global mean temperature rises one or two Kelvin in the next 30 or 50 years. The discussion around that is a fatal distraction. I care whe

I don't care whether global mean temperature rises one or two Kelvin in the next 30 or 50 years. The discussion around that is a fatal distraction. I care whether humans will be able to live here in hundred and life in general exist in five hundred years. Hence I don't care about the minutiae of the models. It is quite difficult to predict how much influence decreasing albedo has on the rate by which the temperature increases, same for thawing permafrost in Siberia releasing an unknown amount of Methane. It is not difficult however to realize that those are positive feedback effects. There is no life possible on Venus. Now, earth is a bit further away from the sun, so won't reach the same temperature, but it doesn't take lead to melt to kill all life as we know it.