Meaning
The term “technology” refers to the application of knowledge for practical purposes.
The field of “green technology” encompasses a continuously evolving group of methods and materials, from techniques for generating energy to non-toxic cleaning products.
The present expectation is that this field will bring innovation and changes in daily life of similar magnitude to the “information technology” explosion over the last two decades. In these early stages, it is impossible to predict what “green technology” may eventually encompass.
The goals that inform developments in this rapidly growing field include:
Sustainability - meeting the needs of society in ways that can continue indefinitely into the future without damaging or depleting natural resources. In short, meeting present needs without compromising the ability of future generations to meet their own needs.
“Cradle to cradle” design - ending the “cradle to grave” cycle of manufactured products, by creating products that can be fully reclaimed or re-used.
Source reduction - reducing waste and pollution by changing patterns of production and consumption.
Innovation - developing alternatives to technologies - whether fossil fuel or chemical intensive agriculture - that have been demonstrated to damage health and the environment.
Viability - creating a center of economic activity around technologies and products that benefit the environment, speeding their implementation and creating new careers that truly protect the planet.
Example of green technology
(1)Energy
(2)Green building~Green building encompasses everything from the choice of building
materials to where a building is located.
(3)Environmentally preferred purchasing
(4)Green chemistry
(5)Green nanotechnology
Green BuildingGreen building or other sufficient name as a 'sustainable building' is an outcome of a design which focuses on increasing the efficiency of resource use energy, water and materials while reducing building impacts on human health and the environment during the building's life cycle, through better siting design, construction , operation, maintenance, and removal.
Green buildings are designed to reduce the overall impact of the built environment on human health and the natural environment by:
- Efficiently using energy, water, and other resources
- Protecting occupant health and improving employee productivity
- Reducing waste, pollution and environmental degradation
Effective green building can lead to;
- reduced operating costs by increasing productivity and using less energy and water
- improved public and occupant health due to improved indoor air quality
- reduced environmental impact
*Materials*
renewable plant materials like bamboo and straw are typically considered to be green in building materials. Recycled stone, recycled metal, and other products that non-toxic, reusable, renewable and recyclable are also example of the materials used in 'green'. Building material should be extracted and manufactured locally to the building side to minimize the energy embedded in their transportation.
*Reduce energy used*
Energy are strongly depend on green building to reduce the used. They may use high-efficiency windows and insulation in walls, ceilings, and floors to increase the efficiency of the building envelope. The other efficient way is passive solar building design, is often implemented in low-energy homes. Designers orient windows and walls and place awnings, porches, and trees to shade windows and roofs during the summer while maximizing solar gain in the winter. In addition, effective window placement (daylighting) can provide more natural light and lessen the need for electric lighting during the day. Solar water heating further reduces energy loads.
*Reducing environmental impact*
Green building practices aim to reduce the environment impact of buildings. Buildings account for a large amount of land use, energy and water consumption, and air and atmosphere alteration. The environmental impact of buildings is often underestimated, while the perceived costs of green buildings are overestimated. A recent survey by the World business council for sustainable Development finds that green costs are overestimated by 300 percent, as key players in real estate and construction estimate the additional cost at 17 percent above conventional construction, more than triple the true average cost difference of about 5 percent.
World in Future By using Application in Green Technology
*Reduce energy used*
Energy are strongly depend on green building to reduce the used. They may use high-efficiency windows and insulation in walls, ceilings, and floors to increase the efficiency of the building envelope. The other efficient way is passive solar building design, is often implemented in low-energy homes. Designers orient windows and walls and place awnings, porches, and trees to shade windows and roofs during the summer while maximizing solar gain in the winter. In addition, effective window placement (daylighting) can provide more natural light and lessen the need for electric lighting during the day. Solar water heating further reduces energy loads.
*Practices*
using sunlight through passive solar, active solar an photovoltaic techniques and using plants and trees through green roofs, rain garden, and for reduction of rainwater run-off. Many other techniques, such as using packed gravel for parking lots instead of concrete or asphalt to enhance replenishment of ground water, are used as well
*Reducing environmental impact*
Green building practices aim to reduce the environment impact of buildings. Buildings account for a large amount of land use, energy and water consumption, and air and atmosphere alteration. The environmental impact of buildings is often underestimated, while the perceived costs of green buildings are overestimated. A recent survey by the World business council for sustainable Development finds that green costs are overestimated by 300 percent, as key players in real estate and construction estimate the additional cost at 17 percent above conventional construction, more than triple the true average cost difference of about 5 percent.
World in Future By using Application in Green Technology
