Two critical existential threats are analysed in this article—nuclear proliferation and climate change. By depicting the escalating nuclear arms race and the geopolitical tensions fuelled by it, the dangerous trajectory of current global policies towards increased weaponisation is emphasised. Central to the discussion is the striking contrast between the substantial investments in nuclear weapons and the glaring lack of funding for climate change mitigation initiatives. The core of the article lies in its innovative proposal—the “nukes-for-climate swap agreement.” This strategy advocates for the gradual reallocation of resources from nuclear weapons development to climate change initiatives