Land use and building orientation also plays a critical role in green architecture. A green building is located to take advantage of its climate and surroundings. These conditions not only affect the efficiency of a building, but of the community and society as a whole. Planning for responsible land use addresses these issues through the consideration of climate, transportation, and the natural environment.
An amazing amount of waste is generated by the construction of a typical building. Green buildings are designed to eliminate waste by using modular systems of construction, recycled products, and efficient use of materials. The ideal green building would create no waste either during construction or use, so the impact on the environment and resources is minimized. Environmentally sensitive development at all levels housing, commercial and institutional appears to be a very promising approach to help achieve sustainability in these terms. Humanity shares a common need for affordable, healthy, durable, comfortable housing and workspaces designed and built to maintain or uplift the human condition. Unfortunately this does not yet frequently occur as a rule throughout the World.
Over the next 10 to 20 years, accelerated movement toward a more sustainable economy and infrastructure will be needed, to head off environmental problems such as global climate change, enlargement of the Ozone "hole," possible food-chain disruption and depletion of ocean fisheries, top-soil depletion and erosion, desertification, and ground water contamination.
Keeping the above points Architects and engineers have to play major role in reducing green house gases. Unfortunately many Engineers and architects do not understand the seriousness of the issues.