THE DEVIL'S ELEMENT

A disquieting study of what Foreign Policy called “the gravest natural resource shortage you’ve never heard of.”

Phosphorus was discovered in 1669 by a German alchemist who observed a white, waxy solid that glowed in the dark and burst into flame “just a little above room temperature.” Egan, who won the Los Angeles Times Book Prize for The Death and Life of the Great Lakes, explains its most vital role: producing food. Two of three essential elements in fertilizer—nitrogen and potassium—are nearly inexhaustible. Not so with the third. When phosphorus runs out, plant growth stops, and feeding 8 billion humans requires massive amounts of fertilizer. Morocco and the Western Sahara hold 70% to 80% of the world’s phosphate reserves, which may or may not run out in this century. After a short history of its production, Egan devotes most of the book to phosphate poisoning. All life requires phosphorus, including ancient blue-green algae. Thriving on a massive inflow of phosphate, they are destroying America’s rivers and lakes. They often cover bodies of water with “guacamole-thick,” toxic mats, and as they die, they suck out the oxygen, producing dead zones. Egan tells the tragic story of Lake Erie. For most of the 20th century, detergents, sewage, and industrial waste produced a widely publicized dead body of water. The Clean Water Act of 1972 was a significant milestone, and by the 1980s, Lake Erie was clean. However, by the turn of this century, it died again, the result of the act’s one yawning exemption: agriculture. Massive phosphate-rich fertilizer from farms and manure from titanic feed lots poured into rivers that emptied into the lake. After recounting the havoc phosphate wreaks elsewhere, the author turns to possible solutions. We waste about 80% of agricultural phosphate, so there is room for improvement. Unfortunately, many current efforts are confined to pilot projects—e.g., recycling sewage and manure—or are largely symbolic, such as banning phosphate from lawn fertilizer.

A fine account, worthy of fertile discussion, of yet another environmental disaster.