Climate change and many environmental problems are caused by the accumulated effects of repeated actions by multiple individuals. Instead of relying on collective responsibility, I argue for a non-atomistic individual responsibility towards such environmental problems, encompassing omissions, ways of life, and consequences mediated by other agents. I suggest that the degree of causal responsibility of the agent must be balanced with the degree of capacity-responsibility determined by the availability of doable alternatives. Then, the more an agent has powers as a (...) group member, the more she is responsible to design the social structure and the infrastructures of the group towards sustainability. Finally, one can hold another agent responsible only if the accused is not in a vulnerable position and if she is capable to take reparative and adaptive actions. (shrink)