Over time, all steep slopes are prone to soil erosion and landslides ... The failed slopes also lost valuable habitat in forested ravines and increased the siltation of many streams and tributaries.

Entire communities across Africa and Latin America are disappearing because of an extreme form of soil erosion ... people in two cities on the edge of a ravine. BBC Click visits a UK research ...

The Ravine Strategy project, one of the largest announced this year, cost $6.2 million, $1.9 million of which comes from the city, was needed because erosion was eroding the creek bank and trail. The ...