Full per-element table (85 elements): HHI (Gaultois 2013), cost (live daily spot for exchange-traded metals + 2013 reference + partner sheet), toxicity (PubChem GHS codes + rubric score), cradle-to-gate environmental impact (Nuss & Eckelman 2014 GWP/CED), physical constants. Every value carries provenance.
Full per-element table (85 elements): HHI (Gaultois 2013), cost (live daily spot for exchange-traded metals + 2013 reference + partner sheet), toxicity (PubChem GHS codes + rubric score), cradle-to-gate environmental impact (Nuss & Eckelman 2014 GWP/CED), physical constants. Every value carries provenance.
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