. . "ons is ____ ??? ??? ??? externalities The negative consequences of harvesting a natural resource, such as the soil erosion and sedimentation of a river that occur after a forest is logged, typically are not included in the market price of the resource; these costs are referred to as ??? ??? ??? the rate of soil erosion increases When trees are harvested and removed ____. ??? ??? ??? boreal forest" . .