I imagine a world where people have decades to figure out what part of the planet remains hospitable for human life. So places like Canada, Russia, the Himalayas, Rockies, Andes, Iceland, etc. The bigger problem will be fighting over those locations and the scarcer resources. But some groups of people in some condition will survive.
That might include local industry and northern shipping routes. Nuclear reactors or solar farms could have been setup decades before. Shelters don't have to be caves. They can be any sturdy structure. It's not like bad weather is going to blow or burn everything down across the entire planet.
I don't see how Earth becomes totally inhabitable for any realistic climate change scenario, including asteroid impact, nuclear winter or super volcanoes. There will always be locations that are survivable. We know this because animal and plant life has survived previous global extinctions on land, and humans have survived ice ages, which are arguably worse for global civilization.
That might include local industry and northern shipping routes. Nuclear reactors or solar farms could have been setup decades before. Shelters don't have to be caves. They can be any sturdy structure. It's not like bad weather is going to blow or burn everything down across the entire planet.
I don't see how Earth becomes totally inhabitable for any realistic climate change scenario, including asteroid impact, nuclear winter or super volcanoes. There will always be locations that are survivable. We know this because animal and plant life has survived previous global extinctions on land, and humans have survived ice ages, which are arguably worse for global civilization.