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Look in your textbook, search the Internet or go to the Library. Use these keywords or concepts to start your search:

• Acid rain
• Biocides
• Conservation
• Erosion
• Detoxification
• Evaporation
• Filtration
• Metals
• Nutrients
• Oxygen
• Oil
• Phytoplankton
• Precipitation
• Runoff
• Transpiration
• Sedimentation
• Water reserve

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© 2004, Arthur L. Buikema, Jr., All rights reserved.