Means in the case of a certain supply or demand, due to changes in supply or demand resulting intensity relative scarcity of resources changes. <br>The amount of greenhouse gases in the atmosphere that can be accommodated is limited, and atmospheric environmental capacity of services is very limited, and human life due to the production and consumption need to demand that greenhouse gas emissions into the atmosphere of infinite, is this the limited nature of existence so that the discharge capacity of the space resources of greenhouse gases having the characteristics of scarcity.
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