Contents: JE Lovelock and L Margulis, Gaia and Geognosy. JF Stolz, DB Botkin, and MN Dastoor, The Integral Biosphere. JS Levine, Photochemistry of Biogenic Gases. JE Estes and MJ Cosentino, Remote Sensing of Vegetation. B Moore III, MP Gildea, CJ Vorosmarty, DL Skole, JM Melillo, BJ Peterson, EB Rastetter, and PA Steudler, Biogeochemical Cycles. M Rambler and L Margulis, Global Ecological Research and Public Response.