While I agree that aircon is grossly overused and building design and insulation could be improved to reduce the need for it, there are plenty of cases where it really is essential. It is a fact that very high temperatures can be very dangerous and life threatening for elderly people and do cause acute discomfort. Try living in temperatures like Melbourne had last summer (> 46C ~= 115F) or Adelaide has at the moment (low 40s with yet more bush fire alerts) and see what you reckon.
My brother lives in Melbourne, as it happens. He tells me that you can have all four seasons (as it were) in the one day, in that part of the world.
I see from the BBC weather site, that Adelaide is indeed very hot, but Brisbane is only slightly hotter than a good English summer, or about average for a continental European summer. Sydney is about the same. Melbourne admittedly has some very hot days forecast, but also some average ones - it is very variable, as we have established.
Australia is hot. Not exactly news. A bunch of Europeans (your ancestors and maybe some of mine) decided to colonise a far-distant land to which they were not evolutionarily suited (killing or displacing the people to whom it
was suited, by the way). And they need air-conditioning in order to survive there, which needs energy. So where would you, as a physicist, propose that this energy come from? Solar, tidal? Wind? I'm sure you have a solution. One that works all year round.
Or maybe they should move somewhere cooler, like Tassie! That's cooler, and very beautiful, I gather.
My brother tells me that you Aussies are absolutely
useless when it comes to water conservation, e.g. you refuse to re-use processed water, and pump it into the sea. You are a bunch of absolute bloody
wasters (literally); and then you whinge about drought. So what are you, as a famous physicist, going to do about this? Are you working on forms of alternative energy? Are you campaigning to change the minds of your fellow citizens? If not, why not?
The ancient people of Nazca in Peru constructed a system of underground aquifers which stored the runoff water from the mountains. Some of them have not survived but a lot of them have, and still serve the present-day city of Nazca (near the famous Nazca lines). It seems that something like this is beyond present day Aussies. OK, perhaps the geology doesn't allow it, but it doesn't sound like you have searched very hard for alternatives.
Green? It seems that you lot (collectively) don't have a
clue, and then you (personally) have the nerve to lecture a bunch of freezing Europeans on the dangers of global warming, claiming your degree in physics as proof that you are a superior being in this respect. Somehow we fools are not able to see that "the science" (all of it, apparently, whatever that is...) is "settled". There is no room for doubt. There are no unknowns.
Yeah, right. (Plate tectonics anyone? These weren't even in the textbooks when my wife was studying the subject at university).