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2 A.Y. Hoekstra, M.M. Mekonnen: Four billion people facing severe water scarcity. American Association for the Advancement of Science, 12. Februar 2016.
3 www.unwater.org/publications/progress-on-level-of-water-stress-642/; www.unwater.org/water-facts/scarcity/.
4 Water for a Sustainable World, The United Nations World Water Development Report, Unesco, 2015.
5 Burek et al, 2016; pure.iiasa.ac.at/id/eprint/13008/.
6 Benjamin Franklin, amerikanischer Drucker, Verleger, Schriftsteller, Naturwissenschaftler, Erfinder und Staatsmann, 1706-1790.
7 The human cost of weather-related disasters 1995-2015, 2015, United Nations Office for Disaster Risk Reduction (UNDRR), Centre for Research on the Epidemiology of Disasters (CRED).
8 Transforming Water Economies, McKinsey & Company, 2012.
9 Global Water Tariff Survey, Global Water Intelligence (GWI), 2018.
10 Food and Agriculture Organization of the United Nations (FAO), AQUASTAT, www.fao.org/aquastat/en/overview/methodology/water-use.
11 Knappe Ressource Wasser, Neue Zürcher Zeitung (NZZ), 21.3.2001
12 Schweizer Verein des Gas- und Wasserfaches (SVGW), www.wasserqualitaet.svgw.ch/index.php?id=874.
13 Ecologic Institute: www.ecologic.eu/2175.
14 NZZ, 8.2.2013.
15 Schweizer Verein des Gas- und Wasserfaches (SVGW), www.wasserqualitaet.svgw.ch/index.php?id=874.
16 Weltwasserbericht der Vereinten Nationen, 2019.
17 Water and Climate, Blue Book, World Water Council, 2017.
18 Weltwasserrat, Bonn, Brasilia, Marseille, New York, 3. November 2017.
19 McKinsey & Co., Water infrastructure, 2013.