For some years I've taken the mickey out of American housebuilding techniques. US suburban homes are typically closely engineered timber frame and plywood structures with a wodge of insulation and cladding that may also be timber and a roof that may be timber shingles. It will withstand most things except American weather, which causes involuntary relocation and may be dangerous to those of a witchical persuasion.
In contrast to British homes solidly constructed of clay bricks, blockwork and Portland cement mortar with heavy concrete roof tiles which won't shift in a breeze and that leaves witches intact.
So no prizes for working out that US homes, from the nation that reportedly produces 25% of the world's CO2, are rather more environmentally friendly. Portland cement manufacture is the world's second greatest CO2 emitter, after energy production, and before transport and air travel. Clay bricks need firing at high temperature. The average new British home will have been responsible for many, many tonnes of CO2 having been emitted in its making.
Timber, in contrast, locks in atmospheric CO2 for as long as it stays intact. A medium tree will have locked in about 4 tonnes of CO2. A house built of timber is therefore very environmentally friendly - it is, quite literally, carbon capture and storage that you can live in. And frame and truss design that maximises resource use and minimises waste as external benefits to price competitiveness (though not tornado proofing) is also a good eco-thing.
The downside to US housing is that it's built scores of miles from employment hubs in suburbs that stretch to the far horizon, so they have to use gallons of petrol every day getting to work. But you can't have everything. And because they're so spread out, when one is spared by tornadoes only to catch fire, it doesn't matter much, whereas our dense housing tightly packed around town and city centres needs to be a bit more fireproof, hence the party wall requirements brought in after a small blaze in 1666.
The difference in approach to house construction is also psychological. Our homes are mini castles, looking back to the Norman keep and the solidity of ashlar and mortar. American homes are on the frontier, log cabins to provide temporary shelter as one moves on. We are fixed, they are mutable. They're going somewhere, while we've got there already.