Greenpeace has been accused of being anti-science over the destruction of experimental GM wheat trials in Canberra earlier this year. Greenpeace’s senior scientist, Dr Janet Cotter, is visiting Australia from the University of Exeter in the UK to counter some of the criticism. Mark Tester is a scientist who is in favour of using GM technology, and he is Professor of Plant Physiology at the University of Adelaide. In opening the discussion Dr Janet Cotter says she thinks the big issue with GM is crop contamination.