I was looking too, there is a map on http://www.gondwanalink.org.

> from the karri forests of the state’s south-west to the semi-arid woodlands and mallee country bordering the Nullarbor Plain further east.

3rd paragraph.

Crude map based on existing roads: https://www.google.com/maps/dir/Karri+forest,+Pemberton+WA+6...

it’s mostly virtue signalling- they described an older couple who bought some cheap land there, still live in Perth and offset their carbon footprint by planting some stuff on that land.