Mumbai (Maharashtra) [India], May 5 (ANI/BusinessWire India): What makes a building sustainable? What are the materials that go into building a house with low carbon footprint? How can this carbon footprint be further reduced? These were some of the questions that ACC Ltd, one of India's most sustainable and innovative cement makers, set out to answer while launching its Houses of Tomorrow, an initiative that seeks to promote construction through materials that are less resource intensive, have a low carbon footprint, while promoting customer satisfaction.