The building and construction sector contributes to about one third of global CO2 emissions and over a third of all energy and material resources are used to build and operate buildings and over a third of the total waste results from construction and demolition activities (UNEP, Green Economy report, 2011). The total material extraction globally increased by a factor of 8 from 1900-2005 and the strongest increase can be observed for construction minerals that grew by a factor of 34. India, being a developing economy, the construction sector contributes to about 10% of the GDP annually. With over 70% of commercial spaces yet to be built, the volume of building and construction activity is going to see phenomenal increase in the years to come. GRIHA, green rating for integrated habitat assessment, the green building rating framework developed by TERI and adopted by Government of India gives considerable weightage to use of materials that have recycled content or use of local materials that require less energy for production and transportation. Usage of flyash /industrial waste based cement for construction is one of them.

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