Answer : The term "sustainable design" generally refers to the design of buildings, products, and systems that are intended to be environmentally responsible throughout their life cycles. While the origins of sustainable design can be traced back to ancient times, the concept did not gain widespread attention until the 1970s and 1980s.
One of the earliest examples of sustainable design is the traditional Afghan bicycle, which was designed to be used in a desert environment with limited resources. The bicycle frame is made from flexible willow branches that are interwoven with goat hair - a material that is both strong and lightweight. This design allows the bicycle to be easily repaired and adapted to different terrain, making it an ideal choice for those living in remote areas.