growth in the agricultural sector, which increased its production by almost 24% thanks to the end of a drought. Agriculture Cereals, legumes and oilseeds Wheat, barley, oats, rye, peas, beans, chickpeas, lentils and canola are grown in South Australia. Fruit and vegetables Apples, pears, cherries and strawberries are grown in the Adelaide Hills. Tomatoes, capsicums, cucumbers, brassicas, lettuce and carrots are grown on the Northern Adelaide Plains at Virginia. Almonds, citrus and stone fruit are grown in the Riverland. Potatoes, onions and carrots are grown in the Murray Mallee region. Potatoes are grown on Kangaroo Island. Viticulture South Australia produces more than half of all Australian wine, including almost 80% of Australia’s premium wines. Energy South Australia has the lead over other Australian states for its commercialisation and commitment to renewable energy. It is now the leading producer of wind power in Australia. Renewable energy is a growing source of electricity in South Australia, and there is potential for growth from this particular industry of the state's economy. The Hornsdale Power Reserve is a bank of grid-connected batteries adjacent to the Hornsdale Wind Farm in South Australia's Mid-North region. At the time of construction in late 2017, it was billed as the largest lithium-ion battery in the world. Mining The Olympic Dam mine near Roxby Downs in northern South Australia is the largest deposit of uranium in the world, possessing more than a third of the world's low-cost recoverable reserves and 70% of Australia's. The mine, owned and operated by BHP, presently accounts for 9% of global uranium production. The Olympic Dam mine is also the world's fourth-largest remaining copper deposit, and the world's fifth largest gold deposit. There was a proposal to vastly expand the operations of the mine, making it the largest open-cut mine in the world, but in 2012 the BHP Billiton board decided not to go ahead with it at that time due to then lower commodity prices. The remote town of Coober Pedy produces more opal than anywhere else in the world. Opal was first discovered near the town in 1915, and the town became the site of an opal rush, enticing immigrants from southern and eastern Europe in the aftermath of World War II. Education and research Higher education and research in Adelaide forms an important part of South Australia's economy. The South Australian Government and educational institutions have attempted to position Adelaide as