Climate change is a well-recognized common concern of humankind. On that basis, this chapter explores the implications of the Common Concern doctrine upon climate motivated rulemaking and implementation in the trade regime. The particular aspect of the climate change problem dealt with here is that of low-carbon technology diffusion. It is proposed that based on this doctrine, the prevalent narrative of trade and technology diffusion issues be reframed in a way that prioritizes the need for resolving existing market failures preventing new technologies from being adopted, especially those of high price, absence of incentives and lack of financing options. Going further, the chapter then closely analyses two potential trade measures – (i) carbon pricing with cross-border recycling of revenue for technology support, and (ii) better rates of official export credit support for low-carbon technologies. It is found that the doctrine of Common Concern, apart from being an excellent normative framing device, can aid better understanding of the WTO rules, and also inspire reforms thereof to facilitate diffusion of clean technologies.