Recycling paper is often praised because it allegedly (ostensibly) helps to preserve forests. Under which assumptions is this a sound economic argument? Are these assumptions realistic? What happens if they are abandoned? An addendum: Assume there are two alternative ways of using land: growing trees and growing peanuts. What effect has recycling on the price of peanuts? Now turn to ivory. Trading ivory is prohibited. Does this help or hinder the preservation of elephants? Why does the situation differ from the argument in favor/against recycling?