Book excerpt: Sustainable Media explores the many ways that media and environment are intertwined from the exploitation of natural and human resources during media production to the installation and disposal of media in the landscape; from people’s engagement with environmental issues in film, television, and digital media to the mediating properties of ecologies themselves. Edited by Nicole Starosielski and Janet Walker, the assembled chapters expose how the social and representational practices of media culture are necessarily caught up with technologies, infrastructures, and environments.Through in-depth analyses of media theories, practices, and objects including cell phone towers, ecologically-themed video games, Geiger counters for registering radiation, and sound waves traveling through the ocean, contributors question the sustainability of the media we build, exchange, and inhabit and chart emerging alternatives for media ecologies.