Gabrys’s Program Earth reads environmental sensing as a techno-ecological practice that does not simply monitor environments but participates in programming them. Its iconic idea is the computational planet: forests, oceans, air, animals, citizens and cities become sensing environments through distributed devices, data protocols and experimental infrastructures. The theoretical contribution is to move beyond the language of neutral environmental monitoring toward an account of sensing as ethico-aesthetic and political mediation. Methodologically, Gabrys combines theoretical analysis, field-based engagement, media studies and environmental humanities, moving through experimental forests, pollution sensing, citizen sensing and smart urbanism. Its conceptual operation is environmentality through sensors: environments are made actionable, governable and speculative through the devices that claim to detect them. The bridge to the wider field links STS, media ecology, environmental humanities, smart-city critique and participatory urbanism, showing that sensing technologies reorganise not only knowledge of the environment but the conditions of environmental citizenship.