This is both a shower thought and a stupid question but I think it fits this community better.
Since air conditioning is apparently heating the local environment while cooling down a house I was asking myself whether it would be possible to basically either build a layer of glass/plexiglass right over the actual outer structure of a house, leaving a tiny gap between wall and glass, or at least put a house in a kind of glasshouse dome with a double glass wall. And consequently inject a sulfur compound, calcite etc into that “gap”, basically creating a very tiny micro-atmosphere that has that sun blocking effect.
Would that work, just logically/technically? Would the environment heat up less, more, or just the same as with geoengineering in the stratosphere? Would it even cool down a house/keep it cool at all?
From your description, this sounds a lot like how double/triple pane windows work, or like a Trombe wall. Although a Trombe wall is meant to heat a home, vents could be used to take advantage of convection currents that shed the heat away from the house.
That said, this wouldn’t necessarily be cooling per-se, but would be avoiding heat gain. And at that point, any material that’s loosely coupled to then house would be equally effective, like a wall with studs 24" (60 cm) apart rather than the USA standard of 16" (40 cm).