Have a look at the state of the environment.
Every five years the Australian Government conducts a comprehensive review of the state of the Australian environment.
National SoE reports provide information about environmental and heritage conditions, trends and pressures for the Australian continent, surrounding seas and Australia’s external territories.
https://soe.environment.gov.au
Don’t forget to have a look at Queensland’s as well
http://www.ehp.qld.gov.au/state-of-the-environment/