Although three years have passed since the onset of the deepest recession from 1929, the most world economies are still fragile, the slipping into another recession being imminent for many of them. “It is a sin to waste a crisis” without learning something of the causes that generated it,...

On its way of multi millennial evolution agriculture has undergone several stages all off them being organically implied in the natural ecosystem. Following the impressive development of the pesticide and fertilizer industries and the excessive utilization of chemical substances in cattle...