Image from Global Footprint Network
In 2011, Earth Overshoot Day, the approximate date our demands on nature for a given year exceeds the planet’s ability to replenish, fell on September 27. In 2010 it was 21 August so surely this is this good news? Unfortunately not. The information to calculate such a date is complex and factors are given weights according to how important they are conceived to be making the date an estimate. Yet this estimate is increasingly accurate as more evidence goes into calculating it. Research suggests that since 2001 the date has moved forwards three days each year.
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