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"Even though it's at the center of environmental thinking, the concept of sustainable development is pretty broad; and considering how often the term gets thrown around and invoked these days, perhaps a quick bit of"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/what-is-sustainable-development-why-is-defining-it-key-to-our-future.html>