African nations led by Somalia, Mauritania and Sudan have the most precarious water supplies in the world while Iceland has the best, according to a survey …that aims to alert companies to investment risks. The ranking, compiled by British-based risk consultancy Maplecroft, said climate change and a rising world population meant that stresses on supplies would be of increasing concern in coming decades for uses from farming to industry…The study said…Industry uses another 22 percent [of worldwide water consumption]…It said that companies including Anglo American, Rio Tinto, Bristol-Myers Squibb, Marks & Spencer, Coca-Cola or Devon Energy were among those seeking to reduce water use…
 

http://af.reuters.com/article/topNews/idAFJOE65N02220100624?sp=true