Where we get our fresh water - Christiana Z. Peppard
View full lesson: http://ed.ted.com/lessons/where-we-get-our-fresh-water-christiana-z-peppard Fresh water accounts for only 2.5% of Earth's water, yet it is vital for human civilization. What...
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Translator: Andrea McDonough Reviewer: Bedirhan Cinar At birth, our bodies are roughly 75% water. We remain mostly water for the rest of our lives. We cannot survive even a week without fresh water. There's no life without it for ecosystems, societies, and individuals. So, how much usable water is there on Earth? Most of the water on Earth is ocean, a salty 97.5%, to be precise, and the remaining 2.5% is fresh water. That little sliver of liquid sustains human life on Earth, it literally holds up civilizations. 2.5% is a small proportion to be sure, and even that is broken down into smaller parts: surface water, water in ice caps and polar regions, and ground water. First, surface water. All the liquid water above ground is surface water an...
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Translator: Andrea McDonough Reviewer: Bedirhan Cinar At birth, our bodies are roughly 75% water. We remain mostly water for the rest of our lives. We cannot survive even a week without fresh water. There's no life without it for ecosystems, societies, and individuals. So, how much usable water is there on Earth? Most of the water on Earth is ocean, a salty 97.5%, to be precise, and the remaining 2.5% is fresh water. That little sliver of liquid sustains human life on Earth, it literally holds up civilizations. 2.5% is a small proportion to be sure, and even that is broken down into smaller parts: surface water, water in ice caps and polar regions, and ground water. First, surface water. All the liquid water above ground is surface water an...
