1. Introduction
Ecological footprinting (EF) is mainly designed as an awareness raising
and environmental education tool that is relatively easy to
calculate, understand, and communicate to the public. It has been
pivotal in progressing the measurement and incorporation of
environmental capacity concerns into environmental behaviour
and decision-making in the 1990s (Wood and Lenzen, 2003).
A detailed description of the original footprint calculation model
can be found in Monfreda et al. (2004). Since its introduction by
Rees and Wackernagel in the early 1990s ([Rees, 1992] and
[Wackernagel and Rees, 1993, 1997]), numerous case studies and
methodological developments have been published. Some of these
footprint developments have been named as new indicators e for
example, the Sustainable Process Index (SPI) (Krotscheck and