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A term now extensively used to describe buildings designed and constructed with a minimum negative impact to the environment, with an emphasis on conservation of resources, energy efficiency, and healthful interior spaces.
The concept that new development must meet the needs of the present without compromising those of the future. Sustainability is measured in three interdependent dimensions: environment, economics, and society—often referred to as the “triple bottom line.”
- Permeablesearch for term
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A substance that allows water to percolate through and helps to maintain and restore area watersheds. Permeable
pavements are an important component in low impact development. Through 2008, more than 80 Green Alleys, featuring permeable pavement, have been installed in the City of Chicago.




