The erosion caused by the Malzac, weaker than that caused by the Griboulle, has left more land usable for crops and fields. This allows farmers to keep a few cow herds. The region’s climate, relief and soils force its inhabitants to base the local economy on agricultural and forestry activities of low productivity. At the same time, climatic and environmental variety generates a large range of plant and animal species, the source of abundant bio-diversity. The Cévennes National Park has worked hard to conserve this wealth by re-introducing some species that had disappeared: roe deer, stags, the Western capercaillie, beavers, and the griffon vulture.