Twenty-one hundred — the planet's future

By 2100, according to IPCC forecasts, the average global temperature may rise by 1.5–4.4°C depending on the emissions scenario. Sea levels will rise by 0.3–1 m. This is the central point of our era's climate debates.

UN demographers forecast that by 2100 Earth's population will reach 10–11 billion, and then begin to stabilize. This will be the result of the demographic transition in developing countries.

The turn of 2100 is a popular horizon for science fiction. By this time authors predict Mars colonies, human-AI fusion, victory over aging, or ecological catastrophe. The future remains open.