T-Zed Homes, a housing complex on six acres of Varathur Road in Bangalore has new age apartments built by Biodiversity Conservation India Ltd (BCIL), Asia's largest green building company. "The purpose of BCIL is essentially to mainstream sustainability-whcih means taking what are called 'alternate technologies and establishing these into cutting-edge systems needed in the marketplace," says Chandrasekhar Hariharan, CEO of BCIL, which he founded in 1995.