to measure human development, there has also been intensive work on developing environmental indicators, such as the Ecological Footprint (EF) ( Wackenagel and Rees 1996 ), the Environmental Performance Index (EPI) ( Esty et al. 2006 ), and the
to measure human development, there has also been intensive work on developing environmental indicators, such as the Ecological Footprint (EF) ( Wackenagel and Rees 1996 ), the Environmental Performance Index (EPI) ( Esty et al. 2006 ), and the