No planet B. Well yes, but somehow that has to convince the likes of South American nations China & dare I say it the USA. The UK trying it’s best to reduce more CO2 , is all very well but I believe the UK only contributes 2% of world global CO2 output.
If the world doesn’t get a handle on said countries the world has a limited life span.
Every species has the right to extinction. The human species is no exception but uniquely the fate of the species is within its control. I remain unconvinced that it will manage to avoid extinction. The planet will recover, it doesn't need us.