For example, the International Council of Local Environmental Initiatives (ICLEI) (Website: www.iclei.org/, last accessed 7 March 2007). Also, for an exploration of different scales of initiative and the role of city networks in relation to climate change, see: Bulkeley, H., and M. Betsill. 2003. Cities and Climate Change: Urban Sustainability and Global Environmental Governance. Routledge Studies in Physical Geography and Environment. London: Routledge.