Table 1.
Description of variables.
| Series | Symbols | Variable Description | Source |
|---|---|---|---|
| Life Expectancy | LEX | LEX indicated the expected lifespan at birth (Total years) | [73] |
| Economic Development | ECD | EXP indicates the per capita income based on (constant USD 2015) | [73] |
| Renewable Energy Consumption | REC | REC indicates solar, geothermal, biomass, wind, and other renewable power supply (TWh) | [74] |
| Human Capital | HUC | HUC measures the aggregation of education, health, and better living standards of people (Index) | [75] |
| Air Pollution | AIP | CO2 was used as a proxy for air pollution (metric per capita) | [73] |
| Natural Resource | NRR | NRR estimates Natural resource rent % GDP | [73] |
Note: WID: World Development Indicators, UNDP: United Nations Development, OECD: Organisation for Economic Co-operation and Development, Programme, TWh: Terawatt hour.