There are two main types of erosion: geological erosion, which occurs naturally over long periods of time, and accelerated erosion, which is caused by human activities like deforestation and lack of conservation practices. Accelerated erosion can occur via several processes, including wind erosion, rain drop erosion, rill erosion, gully erosion, and bank erosion along waterways. Erosion can negatively impact agriculture, increase flooding risks, accelerate desertification, and degrade the land.