• Two massive uninhabitable zones could spread into once-temperate regions of the Northern and Southern Hemispheres.
• Snow pack and aquifers that fed some of the world’s great cities — Los Angeles, Cairo, Lima, Bombay — are drying out.
• At plus 5°C, climate refugees would likely number in the tens of millions, and the potential for conflict over scarce resources rises, including in the United States (e.g., water disputes in the Southwest, refugees from hurricanes like Katrina). But, per the Intergovernmental Panel on Climate Change report, poorer countries would be affected disproportionately.