Climate change and human activity like overgrazing of grasslands is leading to large areas subject to "desertification" where native grass cover dies out during drought periods,exposing soil to erosion.What is potentially the greatest initial soil erosion potential during this type of an event?
A)loss of topsoil by wind erosion on a large scale
B)local gullying produced by intermittent rain storms
C)sand blown in from adjacent deserts
D)growth of shrubs shading the ground,further killing the grasses

Question

Quizplus · Accepted Answer

The loss of topsoil by wind erosion on a large scale is the greatest initial soil erosion potential during this type of event. The lack of vegetation cover allows the wind to pick up and carry away the top layer of soil, leaving behind a barren and eroded landscape. Local gullying produced by intermittent rainstorms and sand blown in from adjacent deserts can exacerbate the problem, but wind erosion is the primary concern. The growth of shrubs shading the ground further kills the grasses, but it does not directly cause soil erosion.

Climate Change and Human Activity Like Overgrazing of Grasslands Is