Australia State of the Environment 2011 Report
http://www.environment.gov.au/soe/2011/report/download.html

This report was prepared by the Australian State of the Environment Committee (ASEC) and was released on 12 December 2011. It presents an independent assessment of the Australian environment, documenting past and present responses to environmental pressures and challenges.

Australian Bureau of Statistics: Australia’s Environment: Issues and Trends 2010
http://www.ausstats.abs.gov.au/ausstats/[...] .pdf

This ABS publication is a source of statistical information on important environmental issues and trends within Australia. The report examines measures of environmental values, changes and conditions, focusing on the areas of water, population, human activities trends, and atmosphere trends.

Australian Government: Department of Sustainability, Environment, Water, Population and Communities
http://www.environment.gov.au/

The Department of Sustainability, Environment, Water, Population and Communities is responsible for implementing the Australian Government’s policies to protect the environment and heritage, and to promote a sustainable way of life. This link provides access to online information of governmental policies relating to the atmosphere, biodiversity, coasts, heritage, housing supply and affordability, human settlements, land, sustainable living, parks and reserves, and water. It also provides information on the Environment Protection and Biodiversity Conservation Act 1999, which continues to shape public policy.