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College Oceanography and Hydrology Questions

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College Oceanography and Hydrology
College Oceanography and Hydrology
Only about 2.5% of all the water on our planet is freshwater. However,
  1. most of this is in large, freshwater lakes
  2. most of this is far from where humans live
  3. most of this is in underground aquifers
  4. over half of this is extremely hard water and is nearly unusable for drinking or agriculture
  5. over half of this in wetlands near coastlines and is becoming contaminated with salt water
College Oceanography and Hydrology
Which one of the following salts is the most abundant in seawater?
  1. potassium bromide
  2. sodium bicarboante
  3. hydrogen borate
  4. magnesium chloride
  5. sodium chloride
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