In the grand scheme of things, worlds, suns, and other fabulous celestial bodies come and go all the time, so the loss of one more wouldn’t really make any difference at all, so you can relax. And, the Earth isn’t really under any serious existential threat at the moment, anyway. I mean, it’s getting warmer, but planets do that from time to time. It quite literally is not the end of the world. Hear George Carlin explain here.
The world will go on for some time, I would imagine, unless it collides with something or some other heretofore unimagined accident occurs. I mean, I guess it is possible the Earth will spontaneously break up into tiny particles and become another ring around Saturn, but the chances of that seem infinitesimally small.
But you’re still worried about the state of the world (aren’t you?) because you’re selfish. Only you don’t think you’re being selfish. You’re just worried about all the pretty flowers, the coral reefs, the poor people in other countries, and the cute animals that will disappear, severely affecting your enjoyment of travel documentaries. To be fair, if the plants and animals on the Earth are capable of wishing anything about you at all, I’m sure they do wish you would either go away or at least clean up your mess, so the anti-litter campaign is probably well received by the non-human inhabitants of the planet.
Somewhere deep down, you must fear that if the world ends, or even just changes slightly, you might also end and leave the world to fight for itself, which it could certainly do better without you, anyway. So, let’s face it, you’re really just fighting for your own survival. Don’t worry, you’ve got this. Humans always seem to find a solution to every problem.
Most inhabitants of the Earth are congregated near large bodies of water such as oceans. If the sea levels rise, you’re thinking you may have to move further inland. It might help a little. The folks who already live inland will most likely welcome you with open arms and give you plenty of food and fresh water as most people have already proven to be extremely concerned about the plight of immigrants and refugees.
Your arrival in the new place isn’t likely to cause too much disruption. They may have to expand the hospital a little, but it shouldn’t take too long. Tax revenue is sure to be increasing, so building more roads, schools, power plants, water processing centers, and so on will be easy enough.
As people like yourself travel around, you will carry germs with you. Things you may have become accustomed to may or may not cause problems for your new neighbors. It’s possible everyone will stay healthy. Of course, animals will also be moving and changing their migration patterns, but that should be all right. It’s not like anyone has ever gotten a serious disease from animals. I mean, whoever heard of bird flu or pig flu or anything like that? It’s absurd.
And no one worries about plagues, anymore, because they haven’t happened in a long time. The viruses that caused great epidemics in the past are long dormant. Who could imagine them being reintroduced into human society as a result of thawing ice or something? Preposterous. New bacteria aren’t likely to emerge, either, as we’ve already dealt with them. Scientists these days develop vaccines and new antibiotics at the drop of a hat. Infectious diseases are simply no longer a matter of concern. It’s hard to imagine a pandemic wiping out billions of people, certainly. That kind of thing doesn’t happen where you’ll be living.
As you travel, you may meet fellow travelers moving away from wildfires, drought, inland flooding, failed crops, and so on. Everyone will be understanding and work together to divide the available food as equitably as possible. The police and military might be called in to help smooth over any disagreements. You may see a few skirmishes crossing borders and so forth, but new drones and fortified structures will offer substantial protection to the good immigrants, like yourself. The people who die in conflict should have been more careful.
It’s possible extreme conditions could lead to occasional power failures, which might impact travel and communication. Some flights may be grounded. Some traffic signals might not work as expected. I guess there is a slight chance it will affect rail transportation. Navigation might be a little difficult. If you have a good signal, you can upload a funny meme about it. I mean, really, global warming shouldn’t affect satellite communication, should it? It’s not like airport runways could get too hot for planes to land, rail could warp under extreme heat, or roads could become impassable from melting or buckling. That kind of thing only happens in movies.
So don’t worry about the old Earth. She’ll keep spinning as long as she is destined to, with or without you. And don’t be too concerned about yourself, either. You’ve survived this far. Surely your good luck will continue. It’s a shame about the animals going extinct, though, and the poor people who have lost their homes. And you’ll always have your memories of how things were.