We know a great deal about historical climate and its variations from various geo logical studies. There are two points worth remarking on. One is that the climate changes frequently and radically, but that the degree of variation and even sense of variation depends on the time scale which we are considering. Secondly, that this is a most unusual geological period for the Planet Earth; we are living in a period of mountain building and glaciations, whereas during most of the last 250 million years (m.y.) there was little ice and little topography. A good view of climate change of the last hundred m.y. can be gained by looking at the paper of Kellogg. We are now in a period of extensive glaciations. The previous interval occurred 300 to 250 m.y. ago, when even the Sahara was glaciated. (Of course, it was at that time near the position of the South Pole; we know that 300 m.y. ago the continents had not broken apart and formed one land mass.) Apparently between 250 and 20 m.y. ago there was little ice on the Earth, even at Antarctica. Continental basins were flooded by shallow seas. This was the period when plant life and marine life proliferated and when most of our fossil fuels were laid down.

The global environmental future is a matter of major scientific and public importance. Problems such as deforestation, pollution, the loss of natural habitats, and greenhouse-gas induced global warming have grave and often uncertain implications. But what do these processes involve? What is causing them and what will or might be their consequences? Global warming would, for example, have far-reaching effects on sea levels, rainfall, glacier dynamics, and the distribution of plants and animals, as well as on a wide range of human activities. The Changing Global Environment provides a clear, well-integrated account by leading scientists of the nature of change in the earth's natural environment in the past, present and future. Taken as a whole, it is distinguished by its concern to understand and to link environmental variations at local, regional and planetary scales, by its clear analyses of human-environment interactions, by its historical perspective, and by an awareness of the social and political causes and consequences of environmental change. The subject is as complex as it is crucial: the authors have aimed not to simplify but to clarify uncertainties, issues and processes. Written to be accessible to both specialist and non-specialist readers, this book also provides a powerful and stimulating framework for the teaching of environmental issues in higher education.

The handbook Global Environmental Change is intended to serve as a reliable and comprehensive resource to attend the needs of researchers, teachers, students, and professionals working in science and policy aspects relevant to environment and sustainability. Entries in the handbook are arranged by major section, and are extensively cross-referenced to allow users to find related titles in a user-friendly way. The handbook is available as a printed volume and as an on-line reference work.

Written for nonscientists, One Earth, One Future can help individuals understand the basic science behind changes in the global environment and the resulting policy implications that the population of the entire planet must face. The volume describes the earth as a unified systemâ€"exploring the interactions between the atmosphere, land, and water and the snowballing impact that human activity is having on the systemâ€"and presents perspectives on policies and programs that can both develop and protect our natural resources. One Earth, One Future discusses why such seemingly diverse issues as historical climate change, species diversity, and sea-level rise are part of a single pictureâ€"and how human activity is the critical element in that picture. The book concludes with practical examinations of economic, security, and development questions, with a view toward achieving improvements in quality of life without further environmental degradation. One Earth, One Future is must reading for anyone interested in the interrelationship of environmental matters and public policy issues.

This book marks a watershed in the social sciences. The qualitative, critical perspective of sociology and allied disciplines challenges the technocentric `managerialism' which dominates environmental policy, its discourse and its impact. The authors explore the relationship between social theory and sustainability in an attempt to transend technical rhetoric and embrace a broader understanding of `nature'.

Global environmental change often seems to be the most carefully examined issue of our time. Yet understanding the human sideâ€"human causes of and responses to environmental changeâ€"has not yet received sustained attention. Global Environmental Change offers a strategy for combining the efforts of natural and social scientists to better understand how our actions influence global change and how global change influences us. The volume is accessible to the nonscientist and provides a wide range of examples and case studies. It explores how the attitudes and actions of individuals, governments, and organizations intertwine to leave their mark on the health of the planet. The book focuses on establishing a framework for this new field of study, identifying problems that must be overcome if we are to deepen our understanding of the human dimensions of global change, presenting conclusions and recommendations.