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shervette uses and abuses lecture_final

shervette uses and abuses lecture_final - USES AND ABUSES...

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1 USES AND ABUSES USES AND ABUSES OF THE OCEAN OF THE OCEAN Chapt Chapt 15 15 Classifications of Marine Resources Classifications of Marine Resources Physical resources Marine energy resources Biological resources These resources can be further classified as renewable or non-renewable. The ocean’s resources are useful and convenient. Proper management is required so resources are not depleted. Salt and various minerals are mined in Salt and various minerals are mined in the sea: the sea: Magnesium Magnesium Manganese nodules Phosphorite (for fertilizers) Metallic sulfides and muds muds Sodium chloride (table salt) Salt evaporation Salt evaporation ponds, Ecuador ponds, Ecuador Toxic Substances are commonly Toxic Substances are commonly released into the environment as a released into the environment as a consequence of mining, manufacture, transportation or use transportation or use Examples: Examples: Metals Metals Pesticides PCBs Petroleum Point source pollution Point source pollution a specific discharge location like a specific discharge location like drain pipes, ditches, sewer outfalls, smokestacks; Easy to identify blame when discovered ( identify blame when discovered (“ smoking gun smoking gun” ), and to ), and to monitor and regulate Review: Review:
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