The current context of environmental management has changed significantly over the last few decades. The Global Supply Chain, in which purchasing is the key player, as well as other dynamic components of the company, is now seeking to take the economic effects of its environmental strategy into account as much as possible. Theories and empirical studies aimed at describing and testing the relationship between environmental performance and Global Supply Chain performance also demonstrate that Win-Win situations, through which both performances are jointly improved. This book illustrates how a so-called "green" Global Supply Chain can be used as a means to advance the Purchasing Process and related processes from an environmental perspective, by implementing sustainable processes through an environmentally oriented approach, in order to reduce risks and improve the overall performance of the company.