Purpose This chapter provides a legal and theoretical overview of environmental PPMs articulated in private standards. It seeks to expand the debate about environmental PPMs, elucidating important dimensions to the issue from the perspective of global governance and international trade law. One of the arguments advanced in this chapter is that a comprehensive analysis of environmental PPMs should consider not only their role in what is regarded as trade barriers (governmental and market driven) but also their significance in global objectives such as the transition towards a green economy and sustainable patterns of consumption and production.