Is an increased elderly population related to decreased CO2 emissions from road transportation?

► I estimate the relationship between a country's share of elderly population and CO2 emissions from road transport. ► In order to alleviate the unit roots issue, the analysis uses a first-order differential equation to estimate models. ► There is a quadratic relationship between CO2 emissions per capita and the share of elderly. ► The level of the turning point in terms of the share of elderly in OECD European countries and Japan is around 16 percent.