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Water Pollution
inbunden,
2005,
Engelska,
ISBN 9780791082027
Because fresh water is limited in supply, ensuring that water us safe for human use and consumption is a major concern. With the expansion of industry and the dumping of chemicals …
Climate Change
inbunden,
2004,
Engelska,
ISBN 9780791082065
Although climate changes have occurred at times in the distant past, the rate at which climatic changes are taking place seems to be increasing, causing concerns that the …