Agriculture is intensive, highly mechanised and efficient by European standards, producing 60% of food needs with only 2% of the labour force. Two-thirds of production is devoted to livestock, the other to arable crops. The main crops that are grown are wheat, barley, oats, potatoes, sugar beets. England retains a significant, though much reduced fishing industry. Its fleets bring home fish of every kind, ranging from sole to herring. It is also rich in a number of natural resources including coal, petroleum, natural gas, tin, limestone, iron ore, salt, clay, chalk, gypsum, lead, silica and an abundance of arable land.