These books offer readers a means of understanding various ailments; clear, careful explanations offer insight into what these conditions are, what causes them, how we cope with them, and the latest information about treatment and prevention.; As Earth's population has continued to grow, reaching 7 billion people in 2011, much of the planet's available fresh water has become polluted, making it unfit for drinking, cooking, or bathing--and contributing to deadly maladies known as waterborne illne; All volumes in the series include primary and secondary quotations, annotated bibliographies, detailed indexes, and lists of organizations to contact for additional information.