The day the Earth caught fire (1961) i thought i saw it, but cant ser a ràting on imdb from me. There's been another film like this I've seen where the world gets knocked out of orbit thus cools down

Knocked out of orbit. Reminds me of an episode of Futurama where it was getting too hot on earth, so they pushed the earth a little farther from the sun. If only it were that easy!

Actually now I think about it, it was a twilight zone episode
7/10 https://www.imdb.com/title/tt0734660/

If you havent seen all of the inital run of 5 seasons of the twilight zone, its well worth it

I've seen that one. I like the twist ending too. Some year, I'll finish that show. I have season 4 and 5 to go I think. Perfect for the black and white challenge.

There is a short story I always liked a lot, about this topic. I would go so far as to say I freaking LOVED the story, when I read it as a kid. I still like it a lot. Anyway, it is called A Pail of Air, by Fritz Leiber. I guarantee that you won't be sorry, if you track it down and read it.
https://en.wikipedia.org/wiki/A_Pail_of_Air

Box, check this story out: https://en.wikipedia.org/wiki/A_Pail_of_Air Oh wow, there are several videos of the story on Youtube. I am not sure if any of them are actual animated films illustrating the story, they might just be a bunch of audiobooks, basically, with a single image of some kind that stays on the screen throughout the whole story. I don't really have time to double check on that. But if you feel like listening to the story, there are several videos on Youtube. They are mostly around half an hour or 35 minutes long.