Polasky, Stephen; Costello, Christopher; Solow, Andrew - In: Handbook of environmental economics : volume 3, …, (pp. 1517-1560). 2005
own sake. Humans depend on natural systems to produce a wide variety of ecosystem goods and services, ranging from direct … use of certain species for food or medicines to ecosystem functions that provide water purification, nutrient retention or … species existence value, the value of bioprospecting and the value of ecosystem services. …