in winter quarter, 1975. The late Lee Schipper, Holzman's original mentor on energy issues, had recommended the class. H ealthy ecosystems provide us with fertile soil, clean water, timber, and food. They reduce the spread of diseases. They protect against flooding. World-wide, they regulate atmospheric concentrations of oxygen and carbon dioxide. They moderate climate. Without these and other " ecosystem services, " we'd all perish.
Holzman, D. C. (2012). Accounting for Nature’s Benefits: The Dollar Value of Ecosystem Services. Environmental Health Perspectives, 120(4). https://doi.org/10.1289/ehp.120-a152