Public procurement is employed by Member States as a tool to shape various policies that are not economic in nature. By spending public funds from the budget, Member States have the opportunity to influence the development and shape of the EU’s internal market. The ability to integrate environmental considerations into the public procurement process and the development of the Green Public Procurement concept contributes to greater use of procurement mechanisms to protect the environment, and combat climate change. Recent years have seen increasing activity by the EU and the European Commission in promoting and facilitating the development of Green Public Procurement. The obligation to comply with environmental law has been introduced into public procurement law as one of the principles. However, most of the legal solutions in the EU to date are facultative in nature, leaving Member States with considerable discretion as concerns their implementation.