For an economy to “grow green”, investments must be made in natural capital. Natural capital provides both “direct” ecosystem services such as the provision of food and raw materials, and “indirect” ecosystem services such as carbon sequestration, watershed protection, aquifer recharge and biodiversity habitat provision. Ecosystem services support human economies and societies. They are usually irreplaceable, or can only be substituted for at great cost. The savings achieved by protecting natural capital can provide convincing economic, in addition to the well-known environmental arguments, for sound environmental management. Incentives for sustainable management of ecosystems through payments for ecosystem services (PES) can boost action on sound ecosystem management.