There is one question which people alive today should be asking themselves.
Do you want the world to stay at least a little bit like the one you were born into?
If the answer is yes, but you don’t know what to do about it, then watch this video:
Personally, I don’t think enough people will find that they care enough one way or the other to make the difference that would prevent the worst from happening. I hope I am wrong.
If not, the best that can happen is that nature finds a way to get rid of most or all of us in order to protect the planet from the consequences of our actions. Nature has many, many ways to do that and it is not beyond reason to think that some or all of them wouldn’t be used to restore the balance.
Assuming that our actions do not first unintentionally but inevitably bring about our own destruction anyway.