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Melbourne has twice ranked first in a survey by The Economist of "The World's Most Livable Cities", once in 2002, and again in 2004. It is sometimes classed as a "world city"; one study group ranks Melbourne, on the basis of relative availability of specialised "advanced services" as a "minor world city" comparable to cities such as Vancouver, Osaka, and Prague.

Because of the aging population, Australia maintains one of the most active immigration programs in the world, absorbing tens of thousands of immigrants from all over the world every year. Most permanent resident visas are granted on the basis of professional skills or family associations.

Australian flora, in order to cope with the extreme conditions present in much of Australia, has evolved to cope with a common set of conditions, namely the ubiquitous presence of fire; soils low in nutrients (due to a lack of recent - geologically speaking - volcanic activity); and a lack of water.

Australia is home to the only three extant monotreme species in the world - two echidnas and the Platypus. The only placental mammals naturally found on the Australian mainland are bats; a large number of rodents which arrived only about 5 million years ago, and the Dingo, which was introduced to Australia by humans perhaps 7000 years ago.

The Perth city skyline displays the economic prosperity the state has enjoyed in the past 20 years. The city's tallest building, Central Park, is the fifth tallest skyscraper in Australia (not measuring spires).

Many raw materials (including resources postulated to exist but yet to be discovered) remain mostly unexploited. Australia is often referred to by economists as the "world's farm", but despite this emphasis on the agriculture sector, in recent years the Australian government has been focusing on the tourism, education and technology markets.

In 1901, Australia adopted a federal constitution and became a self-governing dominion of the British Empire. Australian troops took part in both world wars. Since World War II Australia has been transformed by a massive immigration programme. Australia remains a constitutional monarchy with Queen Elizabeth II as head of state: a referendum to establish a republic was defeated in 1999.

Hobart is the state capital of Tasmania, Australia's island state, and has a mild, temperate, maritime climate with four distinct seasons. Being in the southern hemisphere, summer is December to February.

According to Reporters Without Borders in 2004, Australia is in 41st position on a list of countries ranked by Press Freedom; well behind New Zealand (9th) and United Kingdom (28th). With the Howard government taking control of the Senate in mid-2005 after the 2004 election, media ownership regulations are likely to be relaxed so as to allow the further concentration of media ownership in the hands of a couple of entities.