Carbon Decision Impact Ranker
Which lifestyle change cuts most CO2? Ranked by impact
Tick lifestyle changes you could realistically make:
Ranked by annual CO2 reduction (kg). Average global per-capita: ~4.7 tonnes; high-income: ~10-15 tonnes; Paris 1.5°C target: ~2 tonnes by 2030.
📚 Learn more — how it works, FAQ & guide Click to expand
Learn more — how it works, FAQ & guide
Click to expand
Carbon Decision Impact Ranker
Stop guessing what helps the climate. 12 lifestyle changes ranked by actual annual CO2 reduction. Focus on top 2-3 changes — 80/20 rule applies hard here. Sources: IPCC AR6, UK DEFRA, Our World in Data.
How to use this tool
- 1
Tick changes you could make
12 lifestyle options, ranked by impact.
- 2
See total CO2 saved
Aggregated annual reduction.
- 3
Focus on top 3
80/20 rule — biggest cuts first.
Frequently Asked Questions
Why ranking matters?
Many feel-good actions (reusable bag, turn off lights) save 0.01-0.05 tonnes/yr. Skipping one transatlantic flight saves 1.5-3 tonnes. 100× difference. Ranking helps focus on what actually moves the needle.
Source of CO2 data?
IPCC AR6, UK DEFRA conversion factors, Our World in Data, Project Drawdown. Ranges vary — values are mid-range estimates. Goal: order-of-magnitude awareness, not precision.
What about systemic vs individual?
Both matter. Individual CO2 is ~30% of total emissions; rest is systemic (industry, energy mix). But individual choices DO matter (especially diet, flying), and they signal demand → systemic change follows.
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100% Privacy. This tool runs entirely in your browser. Your data is never uploaded to any server.