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Global Warming
Beginning of essay
The relationship between humans and the state of the ecosystem is not only
dependent upon how many people there are, but also upon what they do. When there
were few people, the dominant factors controlling ecosystem state were the
natural ones that have operated for millions of years. The human pop ....
Middle of essay
....in
three surges and second, that the time between surges has dramatically shortened
(Deevey, 1960).
Figure 1. Population (Log-population verses log-time since 1 million
years ago). Time values on x-axis, ignoring minus sign, are powers of 10 years
before and after 1975 (at 0). Vertical dashed-line at 1995. Filled circles for
known values are to left of 1995 and open circles on and to right of 1995 are
for projected values. (Data updated from Deevey, 1960). ----------
Deevey's 1960 graph has be.... |
| Number of words: 2521 |
Approximate pages: 10 |
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