This powerpoint was created by 7th grade students.

1. Causes of soil erosion Political, Economic and soil erosion Preventing soil erosion Did you Know? EROSION

2. Causes of soil erosion Wind and water are the main agents of soil erosion. The amount of soil they can carry away is influenced by two related factors: * speed - the faster either moves, the more soil it can erode; * plant cover - plants protect the soil and in their absence wind and water can do much more damage. Home

3. How To Prevent Erosion Preventing erosion requires political, economical, and technical changes. Political and economic changes need to address the distribution of land in the world as well as the possibilities incentives to encourage farmers to manage their land sustain ably. home

4. Political, Economic, and Soil Erosion To understand soil erosion we must be aware of the political and economic factors affecting land users. Commercial farmlands, overstocking, mono-cropping, and the plugging of marginal lands unsuitable for cultivation has lead to soil erosion desertification. home

5. Did You Know -Annual soil loss in South Africa is estimated at 300-400 million tons. Replacing the soil nutrients carried out to sea by our rivers each year, with fertilizer, would cost 1,000 million dollars ? home

6. WEBSITES WE VISITED FOR INFORMATION www.prevent erosion. COM www.forester.com Home