Green technology as a reality has been trending lately for just over the last two decades, in several developing and developed countries. Leadership in Energy and Environmental Design (LEED) adheres to a rating system for the design, construction, operation and maintenance of green buildings that are developed by the U.S. Green Building Council.

So, what is a green building? A building that uses less water, optimizes energy efficiency, conserves natural resources, generates less waste and provides healthier spaces for occupants is known as green building. The main objective of green technology is to reduce global warming and green house effect by creating new technologies that don’t affect natural resources that already exist.

There are several technology’s which are used in the construction of green building,

Cool Roofs: Cool roofs are designed to offer increased solar reflectance and decreased thermal emissions. It improves the interior temperature of a building either by reflecting the heat or trapping the air inside. It can be constructed with number of materials including special reflecting paints, cool roof shingles and tiles.

Green Insulation: This uses recycled materials to line the building walls. The materials like jeans and newspapers which we use in our routine life are recycled and used as insulators to prevent airflow. Cotton in jeans and Cellulose in newspaper effectively prevents the flow of air.

Bio-Degradable Materials: The materials which are degradable naturally without contaminating the soil are used in construction practice. For example paints manufactured from milk proteins and Hemcrete (a mixture of Hemp and Lime).

Rammed Earth Construction: Several portions of Great Wall of China were constructed using this technique. It is done by compressing the moist mixture of clay with concrete to form dense and hard walls. This type of structure stays cool in summer and warm in winter.

Strom Water Management: During rainfall season, plenty of water that runs out of sewers may cause soil erosion and may pollute the building as well. This runoff water can be drained by making the building surroundings green by planting trees and forming a green landscapes. These green meadows around the building will absorb the runoff water.

Conservation of Energy: The earth’s natural energy sources like wind energy and solar energy are used instead of using coal powered electricity to spread air around house and to warm water.

Smart appliances are used to reduce the power consumption and also electrochromic smart glasses are used in skyscraper windows in order to sense the intensity of sunlight and thereby automatically regulating quantum of sunlight allowed inside the building.

The buildings which are constructed using the green technology concept are inspected by the Green Building Council and later rated based on their conservation of  water, energy and generation of less amount of wastes etc.,

The ratings are generally categorized as Platinum, Gold and Silver. The certification for rating is provided by Leadership in Energy and Environmental Design (LEED).

N Sundarrajan.