INTRODUCTION Human population in the past 48 years has more than doubled its seize, from 2.5 billion in 1950 to 5.9 billion in 1998 . A few month ago the Secrtary of the United Nation declared a baby as the No. 6 billion citezen of the earth. As you may have noticed, human population has reached a size that threatened our environment and the sustainability of the earth. Is the earth bounded to face this number of human? In fact, in the …
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showed last 75 words of 1552 total
…B. 1990. Energy Demands, Gloucester Press, London Goldsmith, E. & Hildyard, N. 1988. The Earth Report:Monitoring the Battle for Our Environment, Mitchell Beazley Publishers, London. Goldsmith, E. & Hildyard, N. 1992. The Earth Report:An A-Z Guide to Environmental issues, Mitchell Beazley Publishers, London. Miller, G. T. 2000. Living in the Environment:Principles, Connections, and Solutions, 11th ed. Brooks/Cole, pacific Grove, California. Simon, J. L. & Kahn, H. 1984. The Resourceful Earth: A Response to Global 2000, Basil Blackwell Inc. New York.