Use the figure below to answer the following questions. 
Figure 5.2.1
-Consider Figure 5.2.1.When the price is $4 a unit,what is the consumer surplus from the second unit of the good?
Definitions:
Forestry Companies
Businesses involved in the cultivation, maintenance, conservation, and study of forests, woodlands, and related resources.
World Population
The total number of humans currently living on Earth.
Population Growth
The increase in the number of individuals in a population.
Environment Performance Index (EPI)
A method of quantifying and numerically marking a country's environmental performance in different policy categories.
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