30 → 30 million kilograms co2e about 30 kilograms of co2e a year, and about sixty elements left in the ground.
method per-person, per-year estimate from the cited study (Apple / Fairphone LCAs; USGS), world-average where the study allows; the million-people column is straight multiplication. 'for scale' divides by 0.8 t CO2e, the meat-free yardstick.
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