The good Professor Garnaut nails it, page-4

In their Press Club address last week, Garnaut and Sims said policymakers could help to transition Australia's economy into an advantageous low-emissions future by placing a "carbon solutions levy" on this country's fossil fuel extraction sites from 2030-31, at the same level as the European Union carbon price (about $90 a tonne of carbon dioxide).

and this will enliven then discussion.

I peg my name as a strong supporter of the carbon price.