지구 온난화에 대한 영어 에세이

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지구 온난화에 대한 영문 에세이 입니다.

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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 population has
now grown so large that there are concerns that they have become a significant
element in ecosystem dynamics. One of these concerns is the relationship between
human activities and climate, particularly the recent observations and the
predictions of global warming, beginning with the alarm sounded by W. Broecker
(1975).

The relationships among humans, their activities and global temperature can be
assessed by making the appropriate measurements and analyzing the data in a way
that shows the connections and their magnitudes. Human population can be closely
estimated and the consequences of their activities can be measured. For example,
the volume of carbon dioxide, methane and nitrous oxide emissions is an

참고 자료

REFERENCES

Bernard, H. W. Jr., "Global Warming Unchecked", Indiana Univ. Press, Bloomington,
1993

Broecker, W., Science, 189:460, 1975

Deevey, E. S., Scientific American, 203:195, 1960

Gibbons, A. , Science, 262:27, 1993

Gribbin, J. , "Hothouse Earth", Grove Weidenfeld, New York, 1990

Kerr, R. A., Science, 266:544, 1994

Khalil, M. A. K. and R. A. Rasmussen, J. Geophys. Res., 97:4651, 1992

"The World Almanac", Pharos, New York, 1992 - 1995

Meyers, N. Science 269:358, 1995

Overpeck, J. T. Science, 271:1820, 1996