This is an extensive collection, as range management is a major responsibility of BLM. BLM rangelands provide open spaces in the fast-growing West, habitat for wildlife, recreational opportunities for public land users, and preservation of the character of the rural West. The Bureau administers public land ranching in accordance with the Taylor Grazing Act of 1934 and, in so doing, provides livestock-based economic opportunities in rural communities. BLM manages livestock grazing and administers permits and leases held by ranchers who graze livestock, mostly cattle and sheep. The amount of grazing that takes place each year on BLM-managed lands can be affected by factors such as drought, wildfire, and market conditions. BLM's overall objective is to ensure the long-term health and productivity of these lands and to create multiple environmental benefits that result from healthy watersheds.