Book excerpt: In this groundbreaking book, veteran science correspondent Fred Pearce travels to more than thirty countries to examine the current state of crucial water sources. Deftly weaving together the complicated scientific, economic, and historic dimensions of the world water crisis, he provides our most complete portrait yet of this growing danger and its ramifications for us all. "A strong-and scary-case that a worldwide water shortage is the most fearful looming environmental crisis. With a drumbeat of facts both horrific (thousands of wells in India and Bangladesh are poisoned by fluoride and arsenic) and fascinating (it takes 20 tons of water to make one pound of coffee), the former New Scientist news editor documents a "kind of cataclysm" already affecting many of the world"s great rivers." -Publishers Weekly, starred review "Oil we can replace. Water we can"t-which is why this book is both so ominous and so important." -Bill McKibben, author of The End of Nature