The majority of emissions have been released in the last 30 years. All human emissions prior to that point are less than the human emissions from that point. People were talking about climate change back then. People decided to burn more oil.

The map I included there seems pretty optimistic compared to some others I’ve seen. In a recent paper, “Boaty McBoatface” saw faster wind currents increase ocean churn and aided sea warming faster than expected. I’ve taken this to suggest the current ocean raises predicted are under estimates.

The thing with that map is it's absurdly optimistic, as it implies a world entirely happy to have entire populations of other countries and continents to move into yours.

The amount of migration, displacement, rebuilding and major wars that would actually get us to that point is unimaginable.

Uninhabitable Earth is terrifying, and convincing. I thought I had a pessimistic outlook on climate until I read that.

I took it as “this is what would have to happen for the least of us to die”. So yes, optimistic. I also think their projected coastlines are optimistic. I don’t remember seeing so much of the US labeled uninhabitable in other discussions.

Scarily, much of the regions marked in that map as suitable for food-growing is mountainous or tundra. I wouldn’t be optimistic about its fertility and suitability for agriculture – even with optimal climatic conditions.