Greenhouse gas emissions lead to global climate impacts largely independent of where the emissions occur, and consequently a global policy response is most effective. In contrast, local water pollution covers a limited geographic extent, and policy measures to reduce local water pollution in distant lands may not be of policy interest Policies addressing material, land, and water footprints may lead to better resource efficiency, and ensure the future supply of potentially scarce resources. Thus, policies and measures relevant for one environmental issue (e.g., climate change) may not be relevant for other policy domains (e.g., water use).