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Ranking
Which changes are actually large?
Household footprint accounting puts heating, transport and diet far ahead of everything people usually think about.
Persönliche CO₂-Fußabdrücke, mit den dargestellten Fehlerbalken
Die meisten Ratschläge für Verbraucher zur CO₂-Reduktion ordnen Maßnahmen nach ihrem gefühlten Wert. Die Lebenszyklusanalyse ordnet sie nach Umfang, und die beiden Reihenfolgen überschneiden sich kaum.
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The ordering problem
Recycling, turning off lights and avoiding plastic bags dominate the public conversation and are among the smallest levers available. Heating, flying, driving and diet dominate an actual household footprint. The gap between what people do and what matters is the single most useful thing this site can point at.
Food
The food footprint
Dietary shift has real, measurable effects — and the variation within a food category can exceed the variation between categories.
Aviation
Flying and non-CO₂ effects
Contrails and other non-CO₂ effects roughly double aviation's warming impact, and most calculators ignore them.
Tools
Do carbon calculators work?
They have been evaluated. Their value is educational rather than accounting — the uncertainty is very large.
Verwandte Lektüre
Weight Loss Evidence
Diets, drugs, behaviour and maintenance — ranked by the strength of the evidence behind them.
Celiac Wire
Coeliac disease news, guidelines and research — plus the practical business of eating.
EV Ground Truth
Electric cars reviewed on real range, charging behaviour and life-cycle emissions.
The Book Verdict
Health, science and self-improvement books fact-checked against the literature they cite.
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