Kalundborg Symbiosis is a pioneering industrial ecosystem located in Kalundborg, Denmark. It involves a network of companies that collaborate to use each other's by-products, reducing waste and improving resource efficiency. This innovative approach allows businesses to share resources like water, energy, and materials, leading to significant environmental and economic benefits. The symbiosis includes various participants, such as power plants, pharmaceutical companies, and agriculture. By exchanging resources, these companies minimize their environmental impact while enhancing sustainability. This model serves as a global example of how industries can work together to create a circular economy, promoting a more sustainable future.