Book excerpt: Having trouble reconciling your desire to do good by the environment while also moving your company forward? In Earth, Inc., Gregory Unruh shows you how to embed sustainability into everything your company does - profitably. Providing prescriptive steps that will inform your business decisions, Unruh will help you launch your company into eco-minded practices. His five Biosphere Rules apply the laws of nature as a guide for efficient and innovative business operations. Instead of a linear value chain, Unruh offers a cyclical value chain - a chain that offers both sustainability and profitability, for now and for the future.