I agree with aP – some iffy detailing on roofs/falls/major cold bridges/massive over gain of solar in summer/heatstore that would not work/damp an issue etc.
I do ‘get’ earth buried houses (And would do one myself, if the site was appropriate), but not ‘taken’ with the tyres etc – in a 100 years they still need recycling/something doing with them, but at least you got 100 years more out of them than if you hadn’t used them there. I also have a major concern with damp in the walls – and I sell ‘breathing’ natural walls for a living!
I also agree with the whole hippy thing / holes in walls etc being a distraction. It seems that to be ‘green’ you either have to have dreads or hairy pits, or be some smug upper classer with £’000’s to buy your way out of a crap lifestyle. Its about time mr & mrs average did it, without being wacky.
I do think KM’s last point was a good one – maybe the way they were ‘doing life’ was actually a way a lot of us could do life…..to the benefit of us and society.