Ecosystem services are defined as the benefits people obtain from ecosystems. However, there are many synonyms for the term ecosystem services. One such synonym is natural capital. Natural capital refers to the stock of natural resources that provide ecosystem services. Another synonym for ecosystem services is environmental services. Environmental services refer to the services that ecosystems provide to human society, including water purification, soil stabilization, and climate regulation. Ecosystem functions are also synonymous with ecosystem services as they refer to the processes that occur within ecosystems that produce the services. Lastly, environmental goods and services are another synonym for ecosystem services, and they refer to the products or benefits that people obtain from ecosystems, including timber, fish, and clean water.