20 000 → 20 billion litres of water about 20,000 litres of water a year. a full machine uses about twelve litres; hands use sixty or more.
method per-person, per-year estimate from the cited study (Energy Star; Stamminger 2004), 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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