 Professor Quentin Beresford from Perth WA has written an academic paper citing the Lennon government's approval of the Gunns pulp mill in Tasmania as a case study to illustrate the notion of institutional corruption.Gunns sued 20 environmental organisations and individuals for some $6 million in the days preceding the announcement of its plans to build a pulp mill in the Tamar Valley.The proposal had been criticised for not using accepted technology for the bleaching process and instead involved the presence of elemental chlorine at an intermediate stage (rather than hydrogen peroxide or methanol) in the production of the main bleaching chemical chlorine dioxide.