Humanitys Ecological Footprint

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1.4
Humanitys Ecological Footprint
1.2
1.0
Earths Ecological Capacity
.8
Number of Earths
.6
.4
.2
0
1961
1965
1970
1975
1980
1985
1990
1995
2000
2005
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The iPod ExampleThe last minutes in the bottle

• If filling the hard drive of an iPod doubles
  every minute and it takes one hour to fill the
  drive, at what time will the iPod be ¼ full?

• ½ full?

• At what point would owners of the iPod recognize
  there is a problem?

• If rich grandparents recognize your need and
  purchase three new iPods, how long before the new
  iPods are full?

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The iPod ExampleThe last minutes on the hard
drive
1154 a.m. 1/64 full (1.5) 63/64 empty
1155 a.m. 1/32 full (3) 31/32 empty
1156 a.m. 1/16 full (6) 15/16 empty
1157 a.m. 1/8 full (12) 7/8 empty
1158 a.m. 1/4 full (25) 3/4 empty
1159 a.m. 1/2 full (50) 1/2 empty
12 noon full (100) empty
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The effect of the discovery of three new iPods
1158 a.m. iPod No. 1 is one-quarter full.
11 59 a.m. iPod No. 1 is half-full.
1200 noon iPod No. 1 is full.
1201 p.m. iPod No. 1 and 2 are both full.
1202 p.m. iPod No. 1, 2, 3, 4 are all full.
Quadrupling the resource extends the life of the
resource by only two doubling times!
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So, perhaps its not all population..

• I P A T

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Developing Countries
X
X

Consumption per person (affluence, A)
Technological impact per unit of consumption (T)
Environmental impact of population (I)
X
X

Population (P)
X
X

Developed Countries
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Drip Irrigation
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Whats Our Individual Impact?
Per Capita Ecological Footprint (Hectares of land
per person)
Country
9.6
United States
3.8
The Netherlands
0.8
India
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Our Total Impact?
Total Ecological Footprint (Hectares)
Country
3 billion hectares
United States
94 million hectares
The Netherlands
1 billion hectares
India
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Consumption Patterns for Countries of the North
(24 of global population) and Countries of the
South (76 of global population)
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Who are our role models?
or