OK, Mark Twain never actually said “whiskey’s for drinking, but water’s for fighting over”. The first authenticated use of that famous aphorism of the American West was actually by a government official in Montana in 1983. But in a world of growing water shortages, it is just too good not to quote. Journalist John Fleck certainly can’t resist it, even if the full title of his book is Water is for Fighting Over… And other…