"Version: 20151201"--Title page verso."A Morgan & Claypool publication as part of IOP Concise Physics"--Title page verso.Includes bibliographical references.Preface -- Foreword -- 1. The physics of geobiology and geochemistry -- 1.1. Introduction -- 1.2. Fundamental scaling relationships : advection versus diffusion -- 1.3. Summary2. Percolation theory, the effective-medium approximation and up…