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The Green movement has seen a considerable evolution since the early 70s. Those momentous years of the Peace Movement, Vietnam War and the twilight zone of hippie culture, building ‘Green was still emerging. Many concept homes were designed in those early years which looked more like cave dwellings or ant hills and one really wondered whether people were actually serious about living in such homes. Environment, ecology and living with the nature were very much a concept then, but was the domain of few people. What has changed from the 70s to the present day is that building Green homes has very much become an enterprise being seriously attempted by reputed builders and encouraged by various governments. So what started out as a popular cultural idea in the 70s, has now gained the stamp of international approval. In the 70s there was no real professional effort at building Green homes. Designs mimicked natural designs of indigenous people without really trying to incorporate the wishes and aspirations of modern day living. A scientific effort at building Green home designs was more or less absent in the 70s. Modern day avatars of Green home designs follow a rigid certification code in many counties in the world. In the US, The Leadership in Energy and Environment Design (LEED) is an initiative that sets standards for Green Home designs. The same standards have been incorporated by some countries while others have evolved their own. The 70s approach was to design Green homes as units. Present day evolution looks at Green Home designs as a full fledged eco system. Now, factors such as recycling, indigenous practices, environment and architecture are examined holistically. Science too has played an important role in the evolution of Green home designs. In the 70s powerful computers were not available. Present day Computer Aided Designs (CAD) make accurate calculations for wind flow solar capture thus helping build more efficient Green buildings than was possible in the 70s. Even ‘greening of construction materials has received an impetus thanks to advances in science. Construction companies now regularly use recycled products, which are closer to nature thanks to advances of science. A typical example is of Fly ash, a waste product which can as well be used in mixed cement with same qualities. The global environmental challenges are forcing countries to understand the need to conserve our resources. Thus Green home designs have traveled from a ‘niche specialization in the 70s to the mainstream of the construction business today.
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