Richard Heinberg and David Holmgren recently completed a speaking tour of the capital cities of Australia, discussing oil depletion and permaculture. You can listen to the presentations and download the PDFs from Perth here.
Richard Heinberg
Peak Oil: The Challenge, the Possible Responses (click to download 2.4MB PDF)
David Holmgren
Permaculture: Solutions For Energy Descent (click to download 3.1MB PDF)
