Nigeria is named for the Niger River and has a tropical climate. It has a population of over 158 million people and its economy depends on agriculture, oil, and mining. Major crops include cocoa, peanuts, and palm oil. Nigeria is one of the world's leading oil producers, though it struggled economically in the 1980s due to low oil prices. Most Nigerians live in rural villages and practice Christianity or Islam. The country has a proud artistic tradition including masks, sculptures, and cloth.