41.   Much of its once-verdant countryside has been denuded by people who have chopped down trees to make charcoal, causing alarming soil erosion.

42.   Poor cultivation practices over the years led to massive amounts of soil erosion on the steep mountain slopes.

43.   Retaining walls are a lot of work to put in, but they can prevent soil erosion and help cut down on yard maintenance.

44.   Some absorb noise, prevent soil erosion, make houses.

45.   Such international parks have also diffused tensions by convincing rival neighbors to collaborate on protecting watersheds, curbing soil erosion, and slowing deforestation for their mutual benefit.

46.   The aggregate data on the condition of farmland and the rate of erosion do not support the concern about soil erosion.

47.   The chemical may be leaching out of soil at construction sites and other places where soil erosion is common.

48.   The destruction of tropical woodlands will lead to soil erosion and flooding, to global warming and fouled rivers, scientists say.

49.   The growth in food production is slowing because of soil erosion, nutrient-depleting agricultural practices, air and water pollution, overgrazing and deforestation.

50.   The project is designed to help private farmers fight soil erosion and to improve crop production.