"Living machines" refer to systems that integrate biological organisms with technology to perform specific tasks. These systems can include engineered microbes or plants that help in waste treatment, energy production, or environmental monitoring. By harnessing the natural processes of living organisms, these machines aim to create sustainable solutions for various challenges. The concept of living machines is often associated with biomimicry, where nature's designs inspire technological innovations. Researchers are exploring how these systems can improve efficiency and reduce environmental impact, making them a promising area for future development in green technology and sustainable engineering.