摘要：The policy measures for the care of the forest and water can be drawn from identifying a market where supply and demand, we must also determine who pays and who charges for environmental services. In fact it is clear that it will pay anyone interested in the environmental service. Payment can be direct or indirect, can arise from local or national legislation, how to respond to an environmental assessment process and negotiation, there are also different forms and payment mechanisms, such as contribution to the Environmental Fund or Funds for forest plantations , a share of potable water service, incentives for the recovery of a watershed, pay for entrance to a national park. What you pay is not the activity or protective producers do or stop doing, is for the environmental services they produce, or the result or effect of an action. In principle, it is up to the seller of environmental services, how and with what activities make them. In other words, what you pay for a service with a quality and quantity specified in a given time. In principle it is up to the seller of environmental services, how and with what activities or practices helps to produce them.
关键词：Environmental services; contingent; drinking water; river basin; environmental education.
