22 year old in despair over the future of humanity

Too young to despair ?

  " I feel that climate change is increasingly becoming an issue that will unavoidably make large groups of people miserable within this century at the latest.

 It's possible that me, as a 22 year old man, may see extreme hunger and thirst even in my home country of the USA. Because of this, I feel constantly nervous that my life may end horribly, and all my efforts to have a good life may be worthless.

 I definitely do not want to have kids, and be responsible for their future suffering.

 All this said, I don't want this to be the case; I would be very happy if it wasn't, I'm just not completely convinced that humanity can turn this around and continue to have a good standard of living.

 I doubt that humanity will go extinct from climate change soon, but I still think it may happen. Give me hope for humanity and the world!

Edit: people are focusing on the idea of human extinction, but I intended that to be a possible worst case scenario. What I'm more worried about is the extreme lowering of the quality of human living and the immense global suffering leading to a decline in humanity's progress and overall happiness."