How has the destruction of the world trade center in 2001 affected new york city economically?
a: new york is no longer a center of business and commerce.
b: new york is still the business capital of the world.
c: new york attracts people because of its natural beauty.
d: new york has seen a steady decline in population.

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.