Unformatted text preview: The Bottleneck The 20 th century was a time of exponential scientific technical advance, the freeing of arts by an exuberant modernism, and the spread of democracy and human rights throughout the world. The ecological footprint-the av amt of productive land and shallow sea appropriated by each person in bits and pieces from around the world for food, water, housing, energy, transportation, commerce and waste absorption-is about 1 hectare in developing nations and 9.6 hectares in the US. For every person in the world to reach present US levels of consumption with existing technology would require 4 more Earth’s Homo sapiens has become a geophysical force, the 1 st species in world history to attain that dubious destinction. The ecologist is focused on unsustainable crop yields, overdrawn aquifiers, and threatened ecosystems....
View Full Document
- Spring '08
- Evolution, single coral head, footprint-the av amt