Natural Capital:The stock of natural resources and ecosystems that provide a flow of valuable goods and services to people, such as clean air, fresh water, and fertile land.
Environmental Valuation: The process of assigning monetary or non-monetary values to the goods and services provided by ecosystems and natural resources.
Sustainability:The ability to meet the needs of the present without compromising the ability of future generations to meet their own needs, by maintaining the long-term health and productivity of natural ecosystems.