As emperor, Justinian changed the legal system how

Emperor Justinian saw the condition that the Roman law was in and set out to reform the Roman legal system by creating his own set of laws and interpretations based on the old roman laws. ... The result was a ten-book codex, and all laws not included in the codex were repealed.

Explanation:

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this statement is true.

forests are public goods, available for everybody. when usage of such a good becomes interesting for consumers and its usage increases, there can be a risk of overexploitation. it is a non rival good therefore, if one person consumes the good it does not reduce the availability for subsequent consumers.

these caracteristics require the establishment of measures in order to prevent the destruction of a commonly owned space, for example, to restrict the amount of people that have access to the same time.