Abstract
Extensive usage of fossil fuels is causing CO2 emission increase and rapidly increasing the atmospheric CO2 concentration which causes the global warming. The atmospheric CO2 concentration should be stabilized at a low level to mitigate the global warming.
Herein, projections of the world population, economic growth, energy consumption and energy sources in 100 years, which affect the CO2 emissions, are explained. CO2 mitigation measures, especially, carbon capture and storage technologies which are considered to be necessarily implemented for a world based on fossil fuels are described.