"Cradle to Cradle" is a design philosophy that promotes the creation of products with a focus on sustainability and environmental responsibility. It encourages the use of materials that can be fully recycled or safely returned to the environment, rather than following a traditional linear model of production and disposal. This approach aims to eliminate waste and create a circular economy where resources are continuously reused. The concept was popularized by William McDonough and Michael Braungart in their book titled "Cradle to Cradle: Remaking the Way We Make Things." Their framework emphasizes the importance of designing products that are beneficial for both people and the planet, fostering a harmonious relationship between industry and nature.