Use the following to answer question: 
-(Table: Coal Mine Pollution) Use Table: Coal Mine Pollution.The table shows the marginal social benefit and cost of various amounts of pollution from a coal mine.The efficient quantity of pollution is _____ tons.
Definitions:
Extracellular Fluid
The fluid that exists outside the cells, providing a medium for the transport of substances and facilitating cellular interactions.
Intracellular Fluid
The fluid contained within the cells, making up about two-thirds of the total body water content and providing a medium for cellular processes.
Eminent Domain
The power of a government to take land for public use from private citizens for just compensation.
Just Compensation
The fair payment required to be made to an individual when their property is taken for public use, as guaranteed by the Constitution.
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