Question

Explain how human activities decide the rate of soil erosion.

Answer 1

1. Deforestation and Overgrazing: Forest clearing removes the canopy that cushions rainfall and damages root networks that hold the earth together, while overgrazing takes grass cover and compacts the ground with animal hooves. As a result, wind and heavy rain loosen and wash away the exposed topsoil.
2. Unsustainable Farming Practices: Intensive ploughing breaks down the earth’s natural structure, reducing fertile topsoil to loose dust that readily blows away. Cultivating crops directly down hillsides rather than across them creates natural channels that expedite water drainage, rapidly depleting the slope’s important nutrients.
3. Construction and Mining: Urban development, highway construction, and mining operations require the full removal of protecting vegetation and topsoil. This leaves large mounds of loose, unstable ground debris, which heavy rains swiftly wash into local river systems, hastening regional erosion rates.