Also I think you have misunderstood me.

I don't mean run out of energy as in "have zero energy available to us". Of course I realise that's not what you meant. I mean run out of energy as in "no longer have enough energy to maintain our current level of modern civilisation". Which correct me if I'm wrong, but I believe that's what you are suggesting will happen to us within the next 200 years?

No we won't. I mean temporarily sure the cost of energy will increase until it reaches a point that it makes the expenditure required to develop the infrastructure for other erergy options economically viable.

After that, near limitless energy that is far cheaper to generate than the current paradigm.

Lol, if you think that the collapse of our modern civilisation will be because we run out of energy you are sadly mistaken. There are plenty of ways we might see the collapse of modern society and civilisation. Running out of energy isn't one of them. We will NEVER run out of energy!! Not unless we are such a successful species that we colonies the galaxy and beyond and survive to witness the heat death of the universe, and even then it won't be homosapiens who run out of energy. But some distant descendant species.

I'm sorry, I'm not sure I understand what your trying to say here.

First, of course not many people live in the desert.

It's a fucking desert! And we have a massive coastline to live on instead.

But your second point is where I'm confused.

Are you comparing the part of Australia below the tropic of Capricorn with Brazil closest point to the equator.

Bit disingenuous don't you think.

And before you try to say but everyone in Australia live below the tropic of Capricorn. No we don't.

Our largest city's below it, sure. But plenty of people still live in that area.

You do realise that Australia is mostly desert, and that since both Australia and Brazil are on similar latitudes they have similar uv index to each other. Within reason for where exactly in each country you are.

Ahhh, clearly the answer of someone who doesn't have to live under intense UV of the sunlight in Australia.