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Calculateur de durabilité

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Comprendre Votre Empreinte Carbone

Biggest Contributors

The average American emits 16 tons of CO2 per year—4x the global average (4 tons) and 8x the sustainable target (2 tons needed to limit warming to 1.5°C).

  • • Transportation (29%): Cars, flights—2-5 tons CO2/year
  • • Electricity (25%): Coal/gas power—4-6 tons CO2/year
  • • Heating (11%): Natural gas—2-3 tons CO2/year
  • • Food (13%): Meat-heavy diet—2.5 tons, vegan—1.5 tons
  • • Consumption (22%): Shopping, goods—1-3 tons CO2/year

Good news: Most sustainable swaps save money long-term. LEDs, smart thermostats, EVs, and solar all have positive ROI while cutting emissions.

Taxe Carbone : Ce que Cela Signifie pour Vous

A carbon tax charges emitters per ton of CO2. While the U.S. has no federal carbon tax, many economists support it. Here's what different tax levels would cost:

Tax Level 10 tons/yr 16 tons/yr (US avg) 20 tons/yr
$50/ton $500/yr $800/yr $1,000/yr
$100/ton $1,000/yr $1,600/yr $2,000/yr
$200/ton $2,000/yr $3,200/yr $4,000/yr

Current offset cost: $10-20/ton (voluntary market). Offsetting the average American's emissions costs $160-320/year.

Échanges Durables Qui Se Paient d'Eux-Mêmes

🏆 Best ROI Swaps (under 5 year payback)

🌍 Highest CO2 Reduction

  • • LED bulbs: 7-month payback, $4,375 saved over 20 years
  • • Smart thermostat: 1.4-year payback, $3,350 saved
  • • Hybrid car: 2.5-year payback, $10,800 saved over 12 years
  • • Electric vehicle: 4.4-year payback, $13,600 saved
  • • Upgraded insulation: 5-year payback, $4,500 saved
  • • Solar panels (5kW): -6 tons CO2/year, 10.4-year payback
  • • Electric vehicle: -4 tons CO2/year, 4.4-year payback
  • • Hybrid car: -2.6 tons CO2/year, 2.5-year payback
  • • Smart thermostat: -2 tons CO2/year, 1.4-year payback
  • • Secondhand shopping: -1.5 tons CO2/year, saves $800/year

Panneaux Solaires: Les Mathématiques

5kW System Economics (typical home)

Residential solar is one of the few green investments with exceptional financial returns (8-12% annually) plus huge environmental impact.

• Cost: $17,500 gross - $5,000 federal tax credit = $12,500 net

• Annual savings: $1,200-1,800/year (eliminating 90% of electric bill)

• Payback: 7-10 years

• 25-year value: $11,500-30,000+ (panels last 25-30 years)

• ROI: 92-240% over panel lifetime

• CO2 avoided: 6 tons/year = 150 tons over 25 years

• Home value increase: +4% ($16,000 on $400k home)

Why solar wins: (1) 30% federal tax credit, (2) eliminates rising electricity bills (rates up 3%/year), (3) adds home value, (4) massive CO2 reduction.

Key Financial Terms

Understand the essential concepts behind this calculator

Carbon Footprint

The total greenhouse gas emissions caused by an individual, organization, or product, measured in CO2 equivalents.

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Energy Efficiency

Using less energy to perform the same tasks, reducing energy waste and costs.

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Sustainable Living

A lifestyle that reduces environmental impact through conscious choices about energy use, transportation, consumption, and waste.

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View all financial terms in our glossary →

Questions Fréquentes

Questions courantes sur Calculateur de durabilité

Ce calculateur couvre les principales sources (70 à 80 % de l’empreinte typique). Pour une précision accrue, utilisez vos factures d’énergie, vos relevés kilométriques et votre historique de vols. L’Américain moyen émet 16 tonnes de CO2 par an, la plupart se situant entre 10 et 25 tonnes.
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