Fig. 2: Population aging at 20-year periods corresponding to different levels (1.5 °C, 2 °C, and 3 °C - SSP5-8.5) of global warming by country/area.

Country/area-specific age-group population projections are derived from the SSP5 scenario in the first 20-year periods reaching 1.5 °C (2018–2037), 2 °C (2032–2051), and 3 °C (2055–2074) of warming, respectively. X-axis shows the changes in percentage of population ≥ 65 years (%).