Variable

Indicator

Nature

Unit

Source

Capital

Gross fixed capital formation

Input

Billions of US dollar, constant 2010

World Bank

Labour

Number of workers in the country

Input

thousand workers

World Bank

Energy

Energy used

Input

Kiloton

World Bank

GDP

Desirable output

Billions of US dollar, constant 2010

World Bank

CO2

Carbon emissions

Undesirable output

Tons

World Bank