The impacts of climate change and biodiversity loss, as well as the benefits and harms from unsustainable use of natural resources, are unevenly distributed among people and regions, increasing inequity, human vulnerability, and conflicts. To ensure a sustainable and just future, climate change, biodiversity loss, and their security and justice impacts should be addressed simultaneously in policy. The way in which these threats are discussed shapes the actions taken to address them. This research aims to reveal how EU and national policies address environmental security and justice, and how the concept of human security can be utilized in practice to identify vulnerabilities, promote a just transition, and ensure sustainable well-being in a future marked by uncertainty and global crises.