While our energy efficiency is improving, there is a very high correlation, almost near perfect correlation, between GDP growth, and energy usage.

Gone are the days when your indiscretions at university were recorded in a roneoed college newsletter of which there is only one copy left tucked in a filing cabinet at the back of a library. Today that same college newsletter is online, accessible by the whole world now and forever.

Anyone who thinks it's smart to cut immigration is sentencing Australia to poverty.

Nobody looks at opinion polls with more attention than politicians, but of course you've got to remember that a single poll is a snapshot in time.

Look at countries like China, they are determined to dominate all clean technology areas, putting lots of money into wind, solar, electric vehicles and battery storage. America's political impotence, caused by their terrible partisanship, will see them left behind.

We learn from every natural disaster. Whether it's a fire or a flood, we learn something from it so we can respond to the next one better.

Newspapers are busily experimenting with different models. Traditionally, and I suspect in hindsight very mistakenly, online news was free. And once given free access readers felt it was their entitlement.