Australian climatologist will Steffens argued that climate change caused by human activity will fundamentally alter the air, land and oceans for tens of thousands of years.

More extremely hot days, fewer cold ones wetter in the north and drier in the south: this is not a forecast for Australia’s climate but a snapshot of our climate now.

Another survey gave climate conditions, homesickness, and "the stark appearance of the Australian countryside" as the main reasons for leaving.