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Environmental and energy calculators quantify carbon footprints, offset requirements, renewable energy ROI, and resource consumption. They help individuals and organisations make evidence-based sustainability decisions.
Trinn-for-trinn guide
- 1Carbon offset: emissions (tCO₂e) × offset price ($/tonne)
- 2Water footprint: sum of blue, green, and grey water per product
- 3Renewable ROI: (annual savings − annual costs) / initial investment
Løste eksempler
Inndata
Household 10,000 kWh/yr on average US grid (0.386 kg CO₂/kWh)
Resultat
≈ 3.86 tCO₂e/yr · offset at $15/tonne ≈ $58/yr
Solar panels typically reduce home emissions by 80–100%