The aim of the present volume is to review the effects of human activity on physical environment processes, and this is justified not only as a complement to the approach taken by G. P. Marsh his volume Man and Nature (1864), but also as a sequel to the work produced since 1864, with contributions since the mid-nineteenth century to the study of th

Preface -- The Environment - Problems and Perspectives -- The Biosphere - Global Ecological Systems Analysis -- The Ecosystem as the Fundamental Ecological Unit -- Ecological Changes Through Time -- Ecological Changes in Space -- Ecological Resources -- Pollution -- The Ecological Basis of Environmental Management