A view of the Lake along the rocky shore, with a partly sunny sky.

Principle 4

Water makes Earth habitable; fresh water sustains life on land.

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Principle 4 – Fundamental Concepts

  • Fresh water has unique properties. Its density and electrical conductivity (a measure of salinity) are lower than that of salt water.
  • Water is essential for life. All living processes occur in an aqueous environment.

Sea Grant in connection with Great Lakes partners are building a system of support for educators and learners enabling them to engage with and protect this freshwater treasure. 

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