Buildings use 40% of the primary energy supplied in the United States, and more than 70% of all generated electricity, primarily for heating, cooling, and lighting. About 20% of the energy used by buildings can potentially be saved by correcting faults, including malfunctions and unnecessary operation.
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/intelligent-infrastructure-energy-efficiency
[2] http://admin.indiaenvironmentportal.org.in/category/author/neil-gershenfeld
[3] http://admin.indiaenvironmentportal.org.in/category/author/stephen-samouhos
[4] http://admin.indiaenvironmentportal.org.in/category/author/bruce-nordman
[5] http://admin.indiaenvironmentportal.org.in/category/journal/science
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy-efficiency
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/architecture
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-buildings
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/habitat-and-urbanisation