There is a growing global concern about rapidly changing environmental conditions, which is, in turn, linked closely with human health. This book focuses on environmental health issues, scientific understanding of causes, and promising future approaches to control the foremost environmental problems in developed and developing countries. This book emphasizes on the broad spectrum of information resources required in the field of environmental health and provides a detailed review of man-environment-health interrelationships and a basic background for scientists working in the area of environmental health. It offers an overview of the methodology and paradigms of the inter-related, dynamic, evolving fields, ranging from ecology to epidemiology and from environmental health to toxicology. The main features of the book are an evaluation of environmental parameters (such as air quality, water quality, environmental emission) in the perspective of human health deterioration and an improvement of awareness on public health status as a component of human welfare. The chapters include the response of human body to environmental pollutants and also encompass the effects of different environmental factors: physical, chemical, and biological agents of environmental contamination; vectors for dissemination (air, water, soil); solid and hazardous waste, and susceptible populations; bio-markers and risk analysis; the scientific basis for policy decision; occupational health and safety issues; emerging global environmental problems like dissemination of antibiotics in environment and other important areas such as metagenomics application for environmental health. This book is a fundamental text for policy- makers requiring a scientific explanation, for the development of innovative environmental regulations and exposure reduction strategies, scientists researching public health and environmental contamination, and members of the community concerned in human health issues.