population, and the largest foreign-born population, in Australia (1,544,023). Certain nationalities concentrated notably in this state: 74.5% of Lebanese-born, 63.1% of Iraqi-born, 63.0% of South Korean-born, 59.4% of Fijian-born and 59.4% of Chinese-born Australian residents lived in New South Wales. Victoria, the second-most populous state, also had the second-largest number of overseas-born persons (1,161,984). 50.6% of Sri Lankan-born, 50.1% of Turkish-born, 49.4% of Greek-born and 41.6% of Italian-born Australian residents lived in Victoria. Western Australia, with 528,827 overseas-born residents, had the highest proportion of foreign-born population. The state attracted 29.6% of all Singapore-born Australian residents, and narrowly trailed New South Wales in having the largest population of British-born Australian residents. Queensland had 695,525 overseas-born residents, and attracted the greatest proportion of persons born in Papua New Guinea (52.4%) and in New Zealand (38.2%). Impacts and concerns There are a range of views in the Australian community on the composition and level of immigration, and on the possible effects of varying the level of immigration and population growth. In 2002, a CSIRO population study commissioned by the former Department of Immigration and Multicultural Affairs, outlined six potential dilemmas associated with immigration-driven population growth. These included: the absolute numbers of aged residents continuing to rise despite high immigration off-setting ageing and declining birth-rates in a proportional sense; a worsening of Australia's trade balance due to more imports and higher consumption of domestic production; increased greenhouse gas emissions; overuse of agricultural soils; marine fisheries and domestic supplies of oil and gas; and a decline in urban air quality, river quality and biodiversity. Environment Some environmental movements believe that as the driest inhabited continent, Australia cannot continue to sustain its current rate of population growth without becoming overpopulated. The Sustainable Population Australia (SPA) argues that climate change will lead to a deterioration of natural ecosystems through increased temperatures, extreme weather events and less rainfall in the southern part of the continent, thus reducing its capacity to sustain a large population even further. The Australia Institute has concluded that Australia's population growth has been one of the main factors driving growth in domestic greenhouse gas emissions. It concluded that the average emissions per capita in the countries that immigrants come from is only 42 percent of average emissions in Australia, finding that as immigrants alter their lifestyle to that of Australians, they increase global greenhouse gas emissions. The Institute calculated that each additional 70,000 immigrants