Rise by 1°C: Global food shortages
Accelerated melting of Arctic ice, causing drastic climate changes; imminent sinking of coral islands, severe coral bleaching, more frequent and severe droughts, disappearance of snow from African mountains, and a third of the world's land surface will lack fresh water, becoming uninhabitable.
Rise by 2°C: Over one million species heading for extinction
Ongoing ocean warming and acidification disrupt the food chain, destroying all remaining coral reefs; continued melting of the Greenland ice sheet, disappearance of Arctic sea ice causing polar bears to go extinct, worsening water crises, and complicating global food distribution.
Rise by 3°C: Surge of climate refugees
The entire carbon cycle will reverse, soil and plants will no longer absorb carbon but will begin to emit large amounts; most of the Amazon rainforest will burn down to desert, triggering a mass extinction.
Rise by 4°C: Scorching heat dominates all
Continued rise in sea levels inundating coastal cities; Antarctic ice sheets begin to crack, both poles will be ice-free, permafrost melting releasing large amounts of CO2, and food supply imbalances.
Rise by 5°C: World out of shape
Remaining ice in the North and South Poles will disappear; rising sea levels engulf coastal cities and start moving inland, human populations greatly reduce under the dual pressures of drought and floods.
Rise by 6°C: Mass extinction
Humanity faces collective extinction!
