Senator Bob Brown asked the Minister representing the Minister for Sustainability, Environment, Water, Population and Communities, upon notice, on 29 February 2012: With reference to the Minister's response to a question without notice on 27 February 2012 (Senate Hansard, proof p. 22), what components of the protected wild rivers of south-west Queensland fail to warrant protection under the Environment Protection and Biodiversity Conservation Act 1999 as having 'national environmental significance'.