Pluto is truly a well-trained dog. Like his master Mickey, he can get into a large amount of trouble but has enough brains to escape the situation. He acts as Mickey's sidekick, best friend, conscience in some occasions, and pet.
Deforestation causes some of the worst soil erosion. Forests keep soil where it is. The root structures of trees and other plants hold it in place, the natural mulch of leaves prevents soil from being exposed to the erosive forces of wind and rain. The canopy helps soften the impact of heavy rains.
Humans can cause erosion by clean cutting trees and brush. Without the root structure to hole the soil in place it can wash or blow away. Agriculture causes erosion by overgrazing and plowing remove a lower ground cover. Plowing with the furrows up and down slopes can make erosion worse than plowing along the slope.