Most of the filming was in New South Wales, but it was intended to do some in the NT originally. Until they realised what the red dust does to all equipment. Cameras, cars, anything.
I found that the usual American brands for bike computers (Garmin, Wahoo) are more expensive than Chinese brands. If you think a Chinese company handling your ride data is an okay compromise I think the Coros Dura is quite wonderful, with longer battery life (100+ hours) than the competition too.
>And avoiding putting stuff in your body that makes your immune system react like air pollution, microplastics,
Good luck avoiding either of those. For the first one, if you live in a heavily industrialized or urban area and can't just leave for X reasons, should you perhaps breathe less?
As for microplastics, from all I've read about them, they're now in nearly everything and many modern humans who haven't spent their lives living and eating/drinking entirely off the land in the deep remote country are unavoidably saturated with them to the point where (need to find the source again) the average modern adult human in the developed world has something like a teaspoon worth of microplastic inside their body. They've become essentially impossible to avoid if you eat or consume any modern food item.
I don't know if its been conclusively proven yet, but the more natural zinc sunscreens (not all zinc sunscreens are that natural, some of it is marketing) have mostly zinc (and a bit of some other stuff of course), while some of the chemical ones have an impressively long list of random chemicals. On that basis I personally believe a zinc sunscreen is less likely to have future unknown side effects.
(The first chapter of the movie is titled The Pole of Inaccessibility)