Title: Regional Australia
Content:  According to the Australian Department of Home Affairs, all of Australia outside of Sydney, Brisbane, and Melbourne is considered to be "rural and regional Australia".
Title: Outback
Content:  The Outback is a remote, vast, sparsely populated area of Australia. The Outback is more remote than the bush, which includes any location outside the main urban areas. While often envisaged as being arid, the Outback regions extend from the northern to southern Australian coastlines and encompass a number of climatic zones, including tropical and monsoonal climates in northern areas, arid areas in the "red centre" and semi-arid and temperate climates in southerly regions. Geographically, the Outback is unified by a combination of factors, most notably a low human population density, a largely intact natural environment and, in many places, low-intensity land uses, such as pastoralism (livestock grazing) in which production is reliant on the natural environment. The Outback is deeply ingrained in Australian heritage, history and folklore. In Australian art the subject of the Outback has been vogue, particularly in the 1940s. In 2009, as part of the Q150 celebrations, the Queensland Outback was announced as one of the Q150 Icons of Queensland for its role as a "natural attraction".
Title: Rangeland
Content:  Almost 81% of Australia's landmass is broadly defined as rangeland, also known as the Outback (in Western Australia, this increases to 87% of the state's 2,500,000 km2). Rangelands are found in 53 of Australia's 85 bioregions, and support a diverse group of relatively undisturbed ecosystems such as tropical savannas, woodlands, shrublands, grasslands and deserts. The rangelands are home to many of Australia's Indigenous peoples and are of great cultural significance to them. Australian rangelands support significant parts of the nation's economy, including its valuable mining industry (A$12 billion/yr), tourism (A$2 billion/yr), pastoralism and agriculture (A$2.4bn in 2001).
Title: Australia
Content:  and longitudes 112° and 154° East. Australia's size gives it a wide variety of landscapes, with tropical rainforests in the north-east, mountain ranges in the south-east, south-west and east, and desert in the centre. The desert or semi-arid land commonly known as the outback makes up by far the largest portion of land. Australia is the driest inhabited continent; its annual rainfall averaged over continental area is less than 500 mm. The population density is 3.2 inhabitants per square kilometre, although a large proportion of the population lives along the temperate south-eastern coastline.  The Great Barrier Reef, the world's largest coral reef, lies a short distance 
Title: Outback (region)
Content:  It is by far the largest region, with very nearly 80 percent of the land area of South Australia, but less than one percent of its population, making it simultaneously by far the least populated and the least densely populated of all seven regions. The region encompasses all areas north and west of the more densely populated southeastern part of the state, all the way to its northern border with the Northern Territory (26th parallel south) and to its western border with Western Australia (129th meridian east). It also borders with Queensland in the northeast, and with New South Wales in the east (141st meridian east). The Outback Region has a population of 12,496 (as of census of 2006, on an area of 834,679.8, which makes for a population density of 0.015 per km². The largest town is the mining town Roxby Downs (pop. 4055). In total, there are some 60 settlements and communities, including aboriginal communities. Four of the five aboriginal councils of South Australia fall within the boundaries of the Outback Region. They are listed with the Local Government Areas below. Only Gerard (Aboriginal Council) falls within Murray Mallee region, which is southeast of the Outback Region.
Title: Outback
Content: the Kimberley and Pilbara regions in northern Western Australia, ; sub-tropical savanna landscape of the Top End, ; ephemeral water courses of the Channel Country in western Queensland, ; the ten deserts in central and western Australia, ; the Inland Ranges, such as the MacDonnell Ranges, which provide topographic variation across the flat plains, ; the flat Nullarbor Plain north of the Great Australian Bight, and ; the Great Western Woodlands in southern Western Australia. Reflecting the wide climatic and geological variation, the Outback contains a wealth of distinctive and ecologically-rich ecosystems. Major land types include:
Title: Environment of Australia
Content:   The Australian environment ranges from virtually pristine Antarctic territory and rainforests to degraded industrial areas of major cities. Forty distinct ecoregions have been identified across the Australian mainland and islands. Central Australia has a very dry climate. The interior has a number of deserts while most of the coastal areas are populated. Northern Australia experiences tropical cyclones while much of the country is prone to periodic drought. This dry and warm environment and exposure to cyclones, makes Australia particularly vulnerable to climate change -- with some areas already experiencing increases in wildfires and fragile ecosystems. The island ecology of Australia has led to a number of unique endemic plant and animal species, notably marsupials 
Title: Regions of Western Australia
Content: Arid Western Australia tends to be synonymous with the Eremaean province biological region relating to plants and dry conditions ; Remote Western Australia – also synonymous with Outback Western Australia – is determined by the distance and separation from the more heavily populated south west region surrounding Perth and its adjacent hinterland, and the subsequent scattered and low density populated areas towards the central east of Western Australia. ; North West Australia similarly crosses the usual regional definitions to designate an area. ; Southwest Australia may also ignore usual regional definitions. ; Nullarbor – a term with multiple meanings – covers between south east Western Australia, and far west South Australia. In some cases, regions have been grouped into larger areas, to describe a larger area in a single term: 
Title: Australia
Content:  cliffs and gorges of The Kimberley, and below that the Pilbara. The Victoria Plains tropical savanna lies south of the Kimberly and Arnhem Land savannas, forming a transition between the coastal savannas and the interior deserts. At the heart of the country are the uplands of central Australia. Prominent features of the centre and south include Uluru (also known as Ayers Rock), the famous sandstone monolith, and the inland Simpson, Tirari and Sturt Stony, Gibson, Great Sandy, Tanami, and Great Victoria deserts, with the famous Nullarbor Plain on the southern coast. The Western Australian mulga shrublands lie between the interior deserts and Mediterranean-climate Southwest Australia.
Title: Great Victoria Desert
Content:  The Great Victoria Desert is a sparsely populated desert ecoregion and interim Australian bioregion in Western Australia and South Australia.

Question: the vast interior rural area of australia is known as the?
Answer: The Outback.
Outback.