Re: Key Homo Sapience species trait
Hoping that we suddenly evolve the ability to be able to breath under water
Even 200 m rise will be less than fraction of a percent from the dry land. So you will only need to breath under water if you refuse to adapt and move elsewhere. Yeah, sure, there are whole countries that have an issue with moving elsewhere, but once again these are less than fraction of a percent of the overall population. So that is clearly a case of forfeiting adaptability. Just this time it is in the name of politics.
The parts that are 50C today will be 50C tomorrow - that is 5%+ of the world surface. While the various projections for Sahara expansion may look fugly on a map they once again affect a fraction of a percent of the world population.
Global warming does not pose a threat to the survival of the human species.
It poses significant threats to the preservation of the current political and socio-economic status quo. F.E. Europe will not be the same if most of Holland and half of its capitals end up under water. We will have to deal with mass North-African/Middle East migration and a lesser migration out of Polynesia. Though, once again - the migration rate per year we have organized today by meddling in their politics is of an order of magnitude above what would have been a climate induced one. Also, if we take the cynical view, at this rate, there will be none left to migrate from Global Warming as they would have migrated out of the war zone anyway.
It also poses significant threat to biodiversity, though even the worst projections are nowhere near what the Earth has endured in any of the large extinction events like the Late Devonian mass extinction or the Permian mass extinction. In fact, compared to the big 5 mass extinction events (http://www.bbc.co.uk/nature/extinction_events) it will not even register on the paleontological "radar".