With soaring temperatures and increasing power tariffs, eco-friendly homes and buildings may be the answer to cut down on costs. Many city dwellers are opting to construct and reside in green buildings due to the benefits that come with them. Green buildings are constructed with an emphasis on conserving energy and utilizing natural resources. The green building concept in India was introduced with the southern regional center of TERI. Built when green buildings were still a relatively unknown concept, it is known for its ecofriendly design which helps conserve energy efficiently. The building is designed in such that sunlight is diffused through the entire room. Ms Kiran, a research associate from TERI, points out that during the day, "even the library does not use any artificial light". The building has a wall garden that acts as a noise barrier while the roof garden helps in keeping the building cool.