ABSTRACT. In the perspective of biocultural homogenization and the increasingly prominent use of technology, environmental ethics faces new challenges. Development policies, governance, and economic factors impose new ways of understanding and managing coexistence. Phenomena such as pandemics, global warming, migratory phenomena, the expansion of urban and rural areas, and the development of large-scale monocultures show us that human agency, resources, the environment, and surroundings are increasingly intertwined, both physically and metaphysically, in an increasingly encompassing organism where the dissociation between the local and the global becomes difficult to achieve. With a wide range of actions and relationships, environmental psychology and ethics have the task of rethinking the relationship between cultural elements and the biosphere, in order to achieve a balance between sensibility, responsibility, and responsivity. In this article, I aim to illustrate that a biocultural ethical framework emphasizing socio-environmental justice, applied to geoengineering, not only promotes global socio-environmental sustainability but also recognizes the crucial significance of local ecosystems in climate regulation and biodiversity conservation. To do so, I will briefly present some theoretical elements related to the importance of environmental psychology in understanding the connection between individuals and the surrounding environment. Then, I will succinctly present the concept of the ”3Hs” and its implication on biocultural ethics, and subsequently integrate specific elements of biocultural ethics into the analysis of geoengineering ethics to illustrate the need for a perspective that takes this into account. Through this endeavor, I intend to emphasize the vital role of a holistic, multidimensional perspective that guides individual values and community policies towards sustainable practices, ensuring social cohesion and dialogue, respecting the coexistence of life forms, and protecting their habitats.

Key-words: environmental ethics, geoengineering, sustainability, biocultural ethics, environmental psychology.