The United Nations Millennium Declaration identified principles and treaties on sustainable development, including economic development, social development and environmental protection.
The Circles of Sustainability approach distinguishes the four domains of economic, ecological, political and cultural sustainability. This in accord with the United Nations Agenda 21, which specifies culture as the fourth domain of sustainable development.
“Moving towards sustainability is also a social challenge that entails international and national law, urban planning and transport, local and individual lifestyles and ethical consumerism. Ways of living more sustainably can take many forms from reorganizing living conditions (e.g., ecovillages, eco-municipalities and sustainable cities), reappraising economic sectors (permaculture, green building, sustainable agriculture), or work practices (sustainable architecture), using science to develop new technologies (green technologies, renewable energy and sustainable fission and fusion power), to adjustments in individual lifestyles that conserve natural resources.”