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SUSTAINABLE WATER127

affected regions. There is still a major gap betweenglobal climate change models and the more detailed climatic modeling needed to enable accurate forecasting of weather anomalies andextreme events.The COP 16 negotiations in Mexico also have to bridgethe credibility gap following the COP 15 debacle in Copenhagen. While it is too much to expect a comprehensive and binding agreement this year, it will be important to take incremental steps to enable agreement in the future - possibly at COP 17 in South Africa in 2011. The major outlines of the needed global architecture are becoming clear among the three major blocs: post-industrialcountries, still in the grip of financial austerity; the booming industrial economies; and the smaller developing economies. The paradigm ofdevelopment financing linking the first and third blocs is changing, slowly but surely. This was theparadigm under which the Kyoto Protocol was shaped, and which expires in 2012. The big questionis: what role will the second bloc play - the BRICS(Brazil, Russia, India, China, and South Africa)? Willthere be an effective mechanism for financingadaptation to climate change which can involve allthree blocs?The need for "green growth" and building sustainableeconomies in all three blocs is increasingly apparent,and this theme links all countries in reviewing the 20years of accelerating change in the global environmentsince the Rio Earth Summit in 1992. The major UNConference on Environment and Development in Rio in2012 will surely provide a catalyst for the faltering UN talks on climate change. "Green growth" issynonymous with "low-carbon growth." However, since128SUSTAINABLE WATERPhotos: GWPRight:Climate changecan have dramaticconsequences such ashigher sea levels andmore frequent andintense floods Below:By altering thehydrological cycle,climate change willexacerbate the watermanagement problemsthat countries already faceLeft:Rising globaltemperatures arespeeding up the water cycle global warming is already here, it has to be done in the context of the water challenges of more frequent disasters, increasing climate variability andwater scarcity. Fortunately, by managing water better, we can findmany "no regrets" opportunities and solutions tosupport green growth and build resilience to climatechange. The profligate use of water until now in manycountries, coupled with low rates of innovation andinvestment in water worldwide, offers tremendousscope for rapid adaptation. This applies to alleconomic sectors, including energy, industry,agriculture, and the better use and valuing ofecosystems as the "green infrastructure" whichsupports economic growth. Recycling and reusing bothdomestic and industrial wastewaters multiplies thevolume of water which is available for human use.Rethinking water storage holistically - whether throughsmall-scale solutions such as rainwater harvesting, orlarge-scale management of reservoirs, storm-watersystems and aquifers - is essential. We can seek