you do realise that the first work done on carbon damage to climate was done in London just after the start of the industrial revolution 1850. Why then ? because it was already apparent that something was wrong were there actually any reliable records in Australia before then.
https://history.aip.org/climate/timeline.htm

To give up because it is a world wide problem and Australia is to small .Really that is that the Australian Spirit that went up the kokoda trail in world war two. This arguement also assumes that no one else is doing anything patently wrong .I have recently returned from Britain and they are taking it very seriously as seems to be most of the planet