Environmental health has become a subject of paramount importance. Climate change appears to be accelerating even more quickly than previously estimated. Sourcing clean water is becoming a serious problem, and not just for countries in the developing world: the United Nations estimates that a third of the world’s population has inadequate access to freshwater and that this number could increase to two-thirds by the year 2025. Written by internationally acclaimed experts in the United States and abroad, this comprehensive set of environmental health articles serves to clarify our impending challenges as well as opportunities for health and wellness.