In his insightful book, Holy Shit: Managing Manure to Save Mankind, contrary farmer Gene Logsdon provides the inside story of manure -- our greatest, yet most misunderstood, natural resource. He begins by lamenting a modern society that not only throws away both animal and human manure, worth billions of dollars in fertilizer value, but that spends a staggering amount of money to do so. This wastefulness makes even less...