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Pages 3-5

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From page 3...
... and global scales, particularly as they affect ecosystems and biogeochemical cycles and the human consequences of environmental change. • Improving methods for decision making about global change.
From page 4...
... geochemical cycles, land surface characteristics, and ecosystems so much that the Earth system itself has changed significantly. TABLE 7.1 Changes in Land Cover, 1700 to 1980 Land Cover Type Area in 1700 (millions of hectares)
From page 5...
... These changes, which have altered global environmental parameters, are also associated with improved quality of life for many people: average life expectancy has increased 40 percent since 1955 -- from 47.5 years then to 65 years in 1995 -- and infant mortality decreased 60 percent -- from 155 deaths per 1,000 in 1955 to 60 in 1990.3 The rising global averages of per capita energy use, life expectancy, and infant mortality subsume vast disparities. People do not all contribute equally to global change nor benefit equally from progress.

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