I would presume that phones are not allowed on the factory floor - if only for safety reasons around machinery. That would reduce the probability of having records.
I think the article is overplaying the promise of CO reductions.
Around 60% of CO2 (see 1) emissions during cement manufacturing are just a byproduct of the chemical process converting calcium carbonate to lime (see 2) - nothing that solar power can help with.
A library/toolkit for the Swift programming language to built parametric 3d objects.
Give Claude access to the docs and examples and you can do amazing things.