Man\'s capability to transform his environment can bring the benefits of economic development and an opportunity to enhance the quality of life. But this same power, incorrectly applied ,can also cause incalculable harm to the natural environment and consequently to human life. There should be no delay in tackling the task of solving these environmental problems ,as these problems have a cumulative impact. Delayed remedial action will cost considerably more and the damage will become irreversible. The primary goal of preparing these volumes is to present a balanced view of the diversity of issues that relate to the environment and to provide the fundamental information that will allow readers to undersand the comlexities of those issues.