Here is another interesting article on construction materials which are green, but not sustainable, and on how a sustainable building would be the norm in a few years.  
(reproduced from this website)

A building is green when it helps reduce the footprint it leaves on the natural environment and on the health of its inhabitants.

Green home design includes building for energy efficiency, including the use of renewable energy sources such as wind, water, or solar; creating a healthy indoor environ...

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