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Learning without distractions

The Aquatic Environment: Marine and Freshwater

53.5K views on YouTube

Professor Dave Explains 615 tutorials here
Biology

Water covers 70% of the surface of the Earth, and serves as home to an incredible variety of living organisms. Most of that water is salty, or marine, while some is freshwater, and it is in constant motion through the hydrologic cycle. How can we describe these environments and ecosystems?

Script by Ulyana Horodyskyj

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