[shoo]

> So, lately I find that I can't really sleep when I read news about how the planet will probably be unlivable within 100 years

> How do we make sure humanity survives the next hundred years?

There are things that are entirely in your control, partly out of your control, and entirely out of your control. I think that guaranteeing the survival of the human species is approximately entirely out of your control. So there is not much point in worrying about it. Easier said than done.

Focus on the aspects of your life that you have a higher degree of control over and where you can make a positive impact.

I doubt that global warming will cause the human species to become extinct in the next few hundred years. But we might see collapse of a few civilisations. It's happened quite often in the past to other human civilisations. Not the end of the world.

There's a philosophical perspective on this that struck a chord with me when I read it years ago - perhaps it may help you find peace:

https://opinionator.blogs.nytimes.com/2013/11/10/learning-ho...