Erosion
Erosion is the washing away of the topmost layer of the soil by water or wind. It is majorly caused by water or wind. Human activities can also cause erosion. These activities are carried out by man in other to get food, minerals, shelter, economic development and social changes. Erosion has negative impact on people and the environment. There are five types of erosion namely: 1. Gully erosion 2. Contour erosion 3. Sheet erosion