Can Green buildings save India from going grey?

A layman is very likely to show little interest in a speech or a discussion on green buildings. But, when the same person learns that there are only eight years left for us to save Mother Earth from the throes of emissions induced destruction, sitting up and taking notice is the only way out.

• What is a green building and what are the key requisites for constructing a green building?
  

A green building is the one that makes the greatest possible use of natural light and air and least possible utilization of energy and water. It uses industrial byproducts, emphasizes on recycling of waste water, harvesting of rain water, least use of air-conditioning, less production of carbon dioxide and tries to safeguard the environment in every possible way. Making a building green begins at the planning stage. The aim has to be kept in mind throughout. Secondly, safety is paramount in case of a green building. If a labourer dies while the construction is on, the building is never given a green certification.

After the construction is over, it is not possible to make a building green. There are various requisites for planning and constructing a green building.

Firstly, identifying a site for the construction of the building is very crucial. Ideally the site should be located in a centralized place so that the inhabitants can use public transport and less or no fossil fuel run vehicles.

Energy utilization should be optimum in a green building. Care should be taken to reduce the load of air conditioning on the power system.

Water discharge should be zero in a green building. Good green architecture reduces wastage of water in a big way. A green building should ideally have all waste water biologically treated and recycled. Ample structural specifications are incorporated in green buildings for harvesting rainwater. Grey water (water left after washing utensils and clothes) can be used for gardening and flushing purposes.

Maximum effort should be made in use of recycled materials in the construction of the building. Effort should be made to use fly ash Ready Mixed Concrete (20% fly ash + 100% cement) in construction. Aerated concrete blocks can be used instead of bricks for better insulation and heat rejection. Roof insulation should be done with clay rather than chemicals. Maximum bamboo products should be used for flooring.

• What is THE primary consideration while making a green building?
  

Though the term ‘green building’ says that it is about taking care of the environment, the comfort and considerations of the occupant is paramount. There is a standard to determine how good the Indoor Air Quality is, Carbon Dioxide content inside the building should be 400ppm over the ambient CO2 level.

Green buildings have the option of fresh air on demand. Coupled with effective and efficient cooling mechanism, green buildings can let occupants have a wonderful experience.