It looks like Australian central bankers have a long history of speaking on issues relating to ecology and sustainability.
From 1968-1989, the RBA's founding Governor, H.C. 'Nugget' Coombs, gave a series of public lectures on economics and sustainability following his retirement from the Bank which are collected in The Return of Scarcity - Strategies for an Economic Future - published by Cambridge University Press. In these he typically outlined what adaptations the modern economy would have to undergo in order to address the challenges posed by resource scarcity and ecological fragility.
Although these talks contain a fair amount of warnings of impending inflation from resource depletion - motivated by the 1970's oil crisis and findings of the Club of Rome - many of the observations are quite precient (like the call for sustainable energy sources highlighted in bold).
Below is a quote from his introductory essay, Towards a Sustainable Society :
"[In order to address issues presented by sustainability] it will be necessary for us:
• To abandon the conviction that ‘bigger is better’ and to qualify seriously the belief that maximum growth is the ‘sine qua non’ of economic wisdom
• To establish sustainability as the primary objective for enterprises exploiting or using natural resources
• To aim for a rate of economic development which can be financed by our own domestic savings, and preferably which permits a gradual reduction in foreign ownership and external indebtedness, public and private
• To devote intelligence and resources to developing our own science and technology and their application – especially those aspects directed to sustainable sources of energy and to reducing the material and resource content of what we produce and consume
• To promote attitudes and behaviour which value simplicity and frugality and deprecate ostentation and waste
• To increase the intellectual, cultural and social components of our desired lifestyle, at the expense of material possessions; and generally
• To make access to a healthy, stimulating and dignified lifestyle for all citizens the prime objective of economic policy, and to regard the assessment of the numbers of citizens whom this access is denied or inadequate as the primary indicator of economic success or failure, rather than any aggregate or average of material production or money income."
People say grandpa was the Australian iconic public servant. He knew the type of Australia that we could be; he knew the importance of listening to us, the Original people of this continent, the oldest living culture on the planet because we knew how to live sustainably. We need to change the way we live on this planet.