Sustainability+Revolution+Chpt+1

2009 it has units of area because it is calculated by

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Unformatted text preview: If measured in productive land area, the global ecological footprint is 6.8 acres per capita – higher than the 4.3 acres available for each person. Thus, the global population is currently in ecological overshoot: we have exceeded the capacity of the earth to provide resources and absorb our waste. The U.S. ecological footprint far surpasses the global average at 23.5 acres (Hails 2008). The EF is a useful measure of sustainability because it has meaningful units, unlike other measures of sustainability (Stiglitz, Sen et al. 2009). It has units of area because it is calculated by summing the land areas required to provide each of the ecological services required to maintain our current quality of life. I used the Ecological Footprint Quiz by Redefining Progress xvi and found that my ecological footprint is 145 acres. If everyone on earth required the same amount of land, we would need 3.7 earths. According to the EF Quiz, the U.S. average ecological footprint is 246 acres, or 6.4 earths. (...
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