Source: Forbes.com
Date: June 8, 2008

The first six floors of the residence will be dedicated to parking for the Ambani family, guests and employees. Hanging vertical gardens dot the exterior. While they make for good decoration, their key function has to do with energy efficiency: The hydroponic plants, grown in liquid nutrient solutions instead of soil, lower the energy footprint of the home by absorbing heat and sunlight and providing shade that helps keep it cool.

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