Synopsis From the preface: Environment is the hot topic these days, as everyone is experiencing the impact of environmental degradation all over the globe. All living beings are aheading towards a dangerous consequence--extinction. Discussions centering upon the recent United Nations Conference on Environment and Development focused much attention on means of coping with prospective changes in greenhouse gases and stratospheric ozone and with threats to biodiversity. Those issues are serious and should be addressed, but much more important in the decades immediately ahead are problems of the growth and spatial distribution of population and of evolving patterns of material consumption. They must be resolved in ways that maintain and restore systems of air, water, land and biota so as to keep options open for future generations. As is suggestive from the title have gathered here judiciously selected readings derived from various authoritative sources. Definitely, this will prove a dependable source of information to one and all in the field concerned.