Rujukan رجوكن Sumber air

  1. ↑ "Earth's water distribution". United States Geological Survey. Dicapai pada 2009-05-13.
  2. ↑ "Scientific Facts on Water: State of the Resource". GreenFacts Website. Dicapai pada 2008-01-31.
  3. ↑ Gleeson, Tom; Wada, Yoshihide; Bierkens, Marc F. P.; van Beek, Ludovicus P. H. (9 August 2012). "Water balance of global aquifers revealed by groundwater footprint". Nature. 488 (7410): 197–200. doi:10.1038/nature11295. PMID 22874965.
  4. ↑ "The World's Water 2006–2007 Tables, Pacific Institute". Worldwater.org. Dicapai pada 2009-03-12.
  5. 1 2 3 "WBCSD Water Facts & Trends". Dicapai pada 2009-03-12.
  6. ↑ UN Water – Coping with Water Scarcity 2007. fao.org
  7. ↑ "World population to reach 9.1 billion in 2050, UN projects". Un.org. 2005-02-24. Dicapai pada 2009-03-12.
  8. ↑ Foster, S. S.; Chilton, P. J. (2003-12-29). "Groundwater – the processes and global significance of aquifer degradation". Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences. 358 (1440): 1957–1972. doi:10.1098/rstb.2003.1380. PMC 1693287. PMID 14728791.
  9. ↑ "Water". World Bank.
  10. ↑ "Sustaining water for all in a changing climate: World Bank Group Implementation Progress Report". The World Bank. 2010. Dicapai pada 2011-10-24.
  11. ↑ Ocean dumping of sewage sludge is prohibited in the United States by the Marine Protection, Research, and Sanctuaries Act (MPRSA).