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Green Building is the practice of creating structures and using process that are environmentally responsible and resource-efficient through a building life-cycle.  These processes are from siting to design, construction, operation, maintenance, renovation and deconstruction. The purpose of this practice is concerning to economy, utility, durability and comfort.

The main objective of green building is to reduce the overall impact of the built environment on human health and the natural environment.  The reducing of that impact are through energy, water and other resources efficiency. It is also to protect occupant’s health and improving employee productivity, reducing waste, pollution, and environmental degradation.

The main goal of green building is siting and structure design efficiency, energy efficiency, water efficiency and materials efficiency; indoor environmental quality enhancement, operations and maintenance optimization; and waste reduction.

For the siting and structure design efficiency, the construction projects are found from the concept and the design stages. In fact, that is one of the major steps and a project life-cycle will give larger impact on cost and performance.
Green building also measures to reduce energy use. For example, the use of effective windows placement and solar water heating to reduce energy loads.

For water efficiency, reduce the water consumption and protecting the qualities of water are key objectives in sustainable building. The protection and conservation of water throughout the life of the building may be accomplished by designing for dual plumbing that recycles water in toilet flushing.

Materials efficiency refers to the building materials that should be extracted and manufactured locally to the building site to minimize the energy. Where possible, building elements should be manufactured off-site and delivered to site, to maximize benefits, waste and recycling.

For the indoor environmental quality enhancement, the Environmental Protection Agency (EPA) suggests that using the recycle industries is good, such as coal combustion products, foundry sand, and demolition debris in construction projects.

The operations and maintenance (O&M) personnel are part of the project planning. The development process will help retain the green criteria designed at the onset of the project. The green architecture also finds to reduce waste of energy, water and materials used during construction. For the waste reduction, centralized wastewater treatment systems can be costly and use a lot of energy. That is why the alternative to this process is converting waste and wastewater into fertilizer which is beneficial since it is cost and effective.