How can human extinction be prevented?

If I could ask a supercomputer any one question it likely would be: "How can we prevent the extinction of mankind sometime in the next 1000 years?

However, I likely could ask any one of you who have thought about it and you would have already come to the same conclusion I have which is: "The logical way to prevent extinction is what people do with animals when there are too many of them." However, none of us wants to be the one to do this so very likely this won't happen directly through any human being or government.

The second thing that we would need to happen is to stop the burning of all fossil fuels immediately to stop greenhouse gas emissions into carbon dioxide which increases the mean temperatures on the planet.

However, once again getting everyone to agree (all nations) upon this might be literally impossible even though we are trying.

However, another way to think about this is the world is presently playing Russian Roulette through increasingly bad weather around the world. So, basically as fossil fuels burn everywhere many of the people thousands to millions or more this century alone will increasingly die from weather related causes that are caused in some ways by increasing burning of fossil fuels in many different ways.

What are fossil fuels? Fossil fuels are oil which is dead dinosaurs, people, animals and plants from the last 100 million years or so that have percolated for that long and turned into oil or oil shale. They are also, natural gas which comes from the ground but also could be referring to dead wood or farmers last years remnants of crops after harvesting as well as any trees or houses that burn in forest fires. I suppose if you wanted to be specific the list of things that burn might be almost endless.

So, in the meantime the human race is playing Russian Roulette with world populations. It sort of reminds me of the Sequester in the United States that harms everyone equally in sort of ridiculous ways.

So, what will happen? It remains to be seen what will happen the rest of this century and beyond.