In Morocco, Argan tree forests now cover some 8,280 km2 (3,200 sq mi) and are designated as a UNESCO biosphere reserve. Their area has shrunk by about half during the last 100 years, due to charcoal-making, grazing, and increasingly intensive cultivation. The best hope for the conservation of the trees may lie in the recent development of a thriving export market for argan oil as a high-value product. However, the wealth brought by argan oil export has also created threats to argan trees in the form of increased goat population. Locals use the newfound wealth to buy more goats and the goats stunt the growth of the argan trees by climbing up and eating their leaves and fruit.