Christine Milne talked with ABC Radio National Breakfast political editor, Alison Carabine, about the inquiry into Labor's underperforming mining tax.
The Minerals Resource Rent Tax was originally forecast to raise $2 billion in its first year of operation, but only collected $126 million in its first six months.
They also talked about Christine's coal seam gas tour in New South Wales on Thursday and Friday, superannuation, and Greg Hunt and the Coalition's refusal to address the environment and climate change seriously.