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This graph shows how Mexico has moved from using, in net terms, only one third of its domestic biocapacity in 1961 to nearly one and a half times its own biocapacity in 2002. The ecological deficit that exists when ecological demand exceeds supply can be financed by importing biocapacity, liquidating existing stocks of ecological capital, or allowing wastes to accumulate and ecosystems to degrade.

Figure 1 illustrates, for each year, how many Mexicos were
required to meet the resource requirements of Mexico. Resource
demand (Ecological Footprint) for the country as a whole is the
product of population times per capita consumption. Resource supply (biocapacity) varies each year with
ecosystem management, agricultural practices (such as fertilizer
use and irrigation), ecosystem degradation, and weather. This
figure shows the ratio between the country's demand and the
country's biocapacity in each year, and how this ratio has
changed over time. Expressed in terms of "number of Mexicos,"
the biocapacity of Mexico is always 1 (represented by
the horizontal blue line).

Figure 2 tracks, in absolute terms, the average per person
Ecological Footprint and per person biocapacity in Mexico over a
40-year period.
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