Population process—births, deaths, and movements of individuals—express the varied interactions of organisms with their environments. Evolution by natural selection and the regulation of community structure and ecosystem function transcend the individual organism and cab be comprehended only in terms of the dynamics of populations.
For many purposes one may determine average birth and death rates for small samples of individuals and multiply them by the total population size to characterize the overall dynamics of a population. But populations also heterogeneous. Genetic variation in the interaction of individuals with their environments results in evolution. Variation in the suitability of habitat leads to parallel variation in population density and may determine the net movement of individuals within the population.

A veritable mine of information, this book encompasses authoritative information on a number of vital issues like—population structure; social behavior; fluctuations; population regulation; population growth; population ecology; future of man etc.

‘Prevention is better than cure’ goes the famous adage. How the grim state of pollution can be averted or controlled? What are the probable preventive methods for? This book attempts to answer many such queries.

The well-researched readings contained in various chapters of this book like—general introduction; air pollution; water pollution; noise pollution; Environmental Act, 1986; air pollution—legal control; industrial pollution abatement; marine pollutants; environmental protection etc. will prove highly useful and informative to experts and laymen alike

To control the pollution, first we have to classify the pollutants. There are two major types of pollutants: degradable and non-degradable while degradable pollutants include rapidly degradable and slowly degradable pollutants.
The present work is devoted to study the basic principles and practices of pollution control. The authentic information derived from reliable sources is organized in six chapters namely—Pollution and its control; Air Pollution Act, 1981; Principles of noise control; Waste water treatment; Controlling marine pollution; Handling of hazardous substances etc.
This will prove an ideal reference work to the users.

Radiation is fatal for human cell. Similarly thermal pollution is also fatal for human body. The human body fails to sense ionizing radiation. It has been probably responsible for much of the general apprehension about this type of hazard. Reliance must be kept on detection devices, which have been based on the physical of chemical effects of radiation. These effects include: ionizing in gases; ionization and excitation in certain solids; changes in chemical systems; and activation by neutrons.

Radiation and thermal pollution and its adverse effects on man and environment are thoroughly discussed in this book. Preventive and curative methods are also suggested. Topics like—Radiation and its measurement; Nuclear Pollution; Thermal pollution; Convention on Early Notification of a Nuclear Accident; Convention on Assistance in the case of Nuclear Accident or Radiological Emergency (1986); Status of Convention on Early Notifications of Nuclear Accident etc. will prove of utmost use to all concerned.