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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...
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How much of the Earth's water is fresh water? How much of that is used for industrial, agricultural or domestic uses? Why is groundwater becoming increasingly utilized? Enjoy this TED-ED video for the answers.
Tags: water, environment, consumption, resources, environment depend.
PULL a spring, let it go, and it will snap back into shape. Pull it further and yet further and it will go on springing back until, quite suddenly, it won't....
A useful discussion on limits of the planet
This is an interesting article discussing the limits that the Earth's physical systems have and the importance not exceeding any tipping point that could destabilize the planet if we "overstrech the springs."
An interesting counter-balance to the work of the Planetary Boundaries group.