In the World, where to go?

The Intergovernmental Panel on Climate Change predicted a rise of the earth's temperature of between 4 degrees C and 6.4 degrees C by 2100 - this prediction is considered to be conservative and increasingly climate change science is indicating a 4 degree C temperature rise much earlier and closer to 2050. Just what impact would a 4 degree C heat increase mean?

In reality a 4 degree C heat change would be dire for the planet and for the human population. Apart from the ice melting and a sizeable increase in sea levels, increasingly frequent large violent storms and growing acidity in the sea, many parts of the planet will be arid desolate zones without the capacity to sustain life. The United States, South America, Africa, Southern Europe, the Middle East, India, China, South-East Asia and Australia for the most part would be arid deserts. Only the most Northern and most Southern parts of the planet would be warm enough to have human habitation - Canada, Alaska, Northern Europe/Scandinavia, Russia, Greenland in the North and Antartica, New Zealand, Tasmania in the South. A few pockets would remain in Western Australia and the Southern tip of South America but little else.

In order to reduce the impact of this scenario, 70% of carbon emissions would need to be reduced over the next 20 years however the opposite is occuring with carbon increases of around 3%. Perhaps this is the beginning of the end of human domination of this planet. What will come next?