There has been an appreciable development of the Green movement today since the 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.
The concept of living with the nature, environmentally friendly initiatives was very much a part then, but was the preserve of some 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. Then people tried to replicate natural designs of indigenous people with out really attempting to have a convergence with modern day living. There was no concerted effort at scientifically arriving at Green home designs. Today, Green home designs follow strict certification processes in countries the world over. The Leadership in Energy and Environment Design (LEED) is an initiative that sets standards for Green Home designs in the US. Countries the world over, from the West to the East have incorporated the LEED standard and in some cases their own standards. The 70s approach was to design Green homes as units. Today, designers approach Green home designs as full-fledged eco systems. All aspects of the environment, architecture and every avenue for using indigenous methods and recycled materials is explored in a holistic manner.
An important role in the evolution of Green home design has been brought by Science. Computers with their enormous computing powers of today were just not available in the 70s. 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. Scientific progress has also helped green materials used in construction. Nature friendly, recycled products, made possible by advances in science are regularly used by construction companies. For example, cement an important ingredient in any construction today can be mixed with Fly ash, a waste product, which is just as efficient as original cement. As our environmental challenges increase and more and more countries recognize that it is our responsibility to conserve our resources, building Green homes has become an internationally recognized initiative. Designing Green homes has thus traveled from the 70s niche market to the more regular world today.

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