Geographers or students of human-environment relations have an importa
nt role to play in addressing the questions and issues associated with
environmental sustainability. It is the authors' thesis that a centra
l weakness in geography's response to environmental problems and to is
sues of sustainability is the lack of engagement with questions of eth
ics. An overall ethic of care, respect, and responsibility is proposed
. Within this overarching framework, it is suggested that the society-
environment relation may be a scale-dependent problem set, with a sepa
rate expression of environmental ethics associated with each scale. Fo
r example, an ethic appropriate at the planetary scale may differ from
that which is pertinent at the local scale. This argument is advanced
through examples from religious and secular interpretations of human-
environment relations. In a preliminary way, both moral and technical
issues associated with different ethical positions are raised and geog
raphers are challenged to consider and debate their implications. It i
s concluded that without explicit environmental ethical premises, the
sustainability debate is indeterminate.