Narratives that designate a security concern and identify appropriate responses, i.e. securitisation, differ from one another. Some are limited to issues catalysing violent conflicts and suggest extraordinary response, whereas others prioritise risk mitigation in a cooperative manner. Through this lens, the current chapter explores the trend of increasing indirect securitisation of climate change-related industries, technologies and infrastructure in investment relations. It highlights that even though states’ national security motivated actions encroach upon the climate domain, they do not address climate change-induced security risks, and instead, propagate unfairness in international investment law. Using Thomas Franck’s theory of fairness, the chapter proposes a complementary narrative of climate securitisation—one that is fair and equitable, also better at addressing climate security risks both at home and abroad. Its conclusion underscores the need for cooperative strategies to address climate-induced insecurities rather than exacerbating geopolitical rivalries through restrictive security measures.