This is the moral question of our age. Failure to engage with climate change even if we can’t reverse it is a failure in moral thought in my view. I suppose it highlights a limitation in our species that deserves to be selected out by killing off most people and their descendants alive today. It is also possible that we will wipe ourselves and most live on earth out. Somehow I cannot align myself with inaction on this as I have no right to screw up life for the next few generations. Our children’s children will ask why we didn’t even try. There’ll be some of us who did. And I was one of them. I pity those who cannot give an account of themselves to future generations. The dawning realisation will come too late that our generation was the one that broke the earth when we could still just about have saved it. It’s not about reversing it but throwing everything we have got at it to make the impacts less dangerous to life.