Unfortunately the footprint now exceeds the

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Unformatted text preview: expresses the difference between inflows (S, supply) and outflows (D, demand); we can maintain a steady state when the two are equal. The difference between the global biocapacity (S) and global ecological footprint (demand D) is currently -1.5 global acres per capita, with the negative sign again indicating that demand is greater than supply and that we have a global ecological overshoot (Figure 9). For the U.S. the overshoot is -10.9 acres per capita (Hails 2008), which partly explains why the U.S. has to import so many goods. Unfortunately, the footprint now exceeds the biocapacity, and the gap between the two is increasing. In the unsustainable situation where demand is greater than supply, as it is now, we build up an ecological debt. (Figure 10) adapted from (Hails 2008) illustrates an optimistic scenario in which we act quickly to close the gap between supply and demand. The global biocapacity (supply) is one planet earth. The global EF (demand) increases to ~1.3 planet earths in 2005, after which increasing use of sustainable practices decreases the...
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This note was uploaded on 01/08/2014 for the course SUST 510 taught by Professor Marker during the Fall '14 term at Black Hills State University.

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