The science is pretty clear on measurable things like average warming and sea level rise.

The insurance industry has weighed in on whether they think it will be profitable to insure homeowners in some parts of the world. They stand to lose money if they are wrong about risk, so they are in the business of being not wrong about risk, in the aggregate.

The social science is a lot less clear on specific human impacts. That includes economics, public health, and warfare.

However, big changes in things like “whether some land can sustain crops” or “whether some town is on fire” have caused various famous bits of history.

It is a bit irritating that quite a lot of the world is increasingly dependent on air-conditioning for summertime habitability, at the same time that we’re trying to stabilize a transition to more climate-friendly forms of electric power generation.

Personally, I’m still more worried about the bees — pollinator decline specifically, and insect decline generally. The whole food web of nature depends on insects, and humans have spent a lot of resources on manufacturing lots of poisons that specifically target the nervous systems of insects and other small crawly critters.

The climate can shift, and humanity will adapt. But if we crash the entire ecosystem by killing off the bugs, we’re in a much worse situation.

I don’t think many people, even the doomiest doomsayers, reckon it’ll lead to human extinction. But “food and water shortages, mass migration and small conflicts” is not nothing, and could lead to a situation where we think extinction might have been a preferable option.

I don’t think it’s likely to lead to human extinction even if unfettered, but like ice ages and the fabled meteor, we will probably have a bottleneck event where most people, if not most species, will die.

Currently we’re only on track for something like 2-3 billion people dying, and most of the danger comes from the migrations and unrest, which isn’t really a threat to humanity as species, just society as we know it.

Something inbetween. Humans might not get extinct, but you and everyone you know (or the next few generations) either will, or will revert to mediaeval way of life at best. Lack of drinking water is no joke.

Same for the rest of the ecosystem. Not everything will die out, even more than just cockroaches will remain. But a lot of wildlife will keep getting destroyed.

Personally I’m expecting a dystopia like we see in cyberpunk stories.

I definitely believe climate change will transform our existence, but im still torn to what extent. Mostly, because I believe in our ability to create technology.

I think that if we continue on our current path, (Nothing at all changes. We still try to live in cities and grow food in the soil, and depend on rivers and lakes) we will become extinct. Eventually, this earth will not support us as is. Maybe If we come up with some large scale carbon capture system, like tomorrow, we can maintain some semblance of normalcy latter down the road.

We will have to find innovative ways to take shelter from the outside elements, grow our food indoors, and make water from…something. The question is, how innovative will we be? Will we come up with some sort of biodome or terraforming technology. We can manipulate indoor spaces to grow large amounts of food now, but will we create all the components and nutrients without our current industrialized processes. Will we create a water extraction solution that will seem akin to alchemy at worst, or at best find new ways of seeking water deep within our earth. Or maybe we’ll just figure out how to really utilize that pesky fusion reactor, finally build the damn enterprise, and hop ship to another planet.

No matter what, I think that the human population will take a hit. Even with innovation, there’s no way we will sustain everyone currently inhabiting this planet. I think our population size will be determined by what we can invent. Eventually, if we don’t invent the right tools, we will go extinct when the climate gets to its furthest extreme.

Maybe the climate will swing back around, or maybe the planet will turn into a ball of dust, but that will be so far in the future, it’s silly to think about now. For now, honestly, I just keep picturing a world kind of like in those Myst books from the 90s…

I’ll be interested to see if all you “it’s not that bad” people are still singing the same tune when a heat dome encapsulates a city for days or weeks with no power or ac and an entire city just dies.

Personally I think we’re past the point where billions of people are going to die, and if we do nothing then yes we will go extinct. I also don’t think we’ll be able to because of the instability climate change will cause. People like to go on about how the first world will be mostly fine, send half a country rushing towards the us southern border because the other half literally died because their home is unlivable now and see if this super power doesn’t crumble to pieces from within.

VT, my old homestate, was slammed with a flood. It is one of the worst floods in that state’s history since 1927. It is due to climate change.

To deny the effects of climate change, would be like being slapped in the face very hard and being unfazed by it. Then wondering why hours later, what transpired.

I think we all gonna die in next 50 years. Massive flood is already predicted to cover many places, as well combustible ending and still no valid alternative energy. It isn’t something unaspected at all. Will begin with electric shortage, then slowly we gonna die for cold, famine, even for a simple fever because lacking of medicinals. Earth climate actually will heal while we die.

More people = more pollution. More pollution = harsher climate. Harsher climate = less people. It’s all balanced.