A majority of the human population spends an average of 90% of their time indoors. In the "Air Quality Guideline-1999", the World Health Organization (WHO) states that most of a person's daily exposure to many air pollutants comes through the inhalation of indoor air. Many of those pollutants can cause health reactions in people having asthma and allergies and can also cause 'Sick Building Syndrome'. The Indian Green Building Council's Leadership in Energy and Environmental Design (LEED) Green Building Rating SystemT is an internationally accepted benchmark for the design, construction and operation of high-performance green buildings. LEED-INDIA provides building owners, architects, consultants, developers, facility managers and project managers the tools they need to design, construct and operate green buildings. It promotes a whole-building approach to sustainability by recognizing performance in the following five key areas: Sustainable site development Water savings Energy efficiency Materials selection and Indoor environmental quality The LEED-INDIA rating system provides a roadmap for measuring and documenting success for every building type and phase of a building lifecycle. Deeply committed to the health of residents in its buildings Mahindra Lifespaces has applied for pre-certification for Green Residential building rating for its projects. The company has already implemented a number of green building initiatives, both as a mandatory part of Green Building development and to ensure healthy living spaces for our residents. These include: Improvement of ventilation effectiveness by providing an openable window space to floor space ratio of over 15% (as against the minimum of 4% stipulated by ASHRAE). Use of  low VOC (Volatile Organic Compound) paints, adhesives and insulations inside the apartments for improved moisture management and control of contaminants. High–albedo-insulating material on the terrace roof, with a SRI (Solar Reflectance Index) value of  over 78,  to reduce heat absorption and the resultant energy demands for air-conditioning. Installation of high energy efficient low emissivity glass in all fenestration which will have low SHGC (Solar Heat Gain Co-efficient) with U value less than 1 Btu (Thermal) /hr.sqft.ºF. This  glass has a high light transmission ratio with low shading coefficient and in turn induces more daylight effect than normal glass. Due to low SHGC, the energy requirement for indoor air-conditioning is substantially reduced. Use of flyash based concrete bricks/blocks of low energy density for internal as well as external walls. Covering of  walls with cement mortar plaster incorporating Polypropylene fibres and waterproofing admixtures. This kind of `Building Envelope’ protects the building from water leakage. It also promotes better insulation, thus reducing the energy demand for air-conditioning systems. Installation of highly water efficient fixtures with aerators will be installed in water outlets in each apartment to minimize wastage and reduce water demand by minimum of  30% w.r.t normal water fixtures. Development of  an innovative erosion and sedimentation control management system outside the building, with a rainwater harvesting system and storm water management to recharge the ground water. Installation of an in-house STP (Sewerage Treatment Plan) to reuse wastewater generated from the building, to further reduce demand for water. All the above initiatives will together create a healthy living space for our residents and result in interactive effects of energy efficiency measures. What is ‘Green Design? The US Green Building Council defines ‘green’ design as Design and construction practices that significantly reduce or eliminate the negative impact of buildings on the environment and occupants in five broad areas: Sustainable site planning Safeguarding water and water efficiency Energy efficiency and renewable energy Conservation of materials and resources Indoor environmental quality