Mae'r rhan fwyaf o'r cyngor carbon i ddefnyddwyr yn graddio gweithredoedd yn seiliedig ar ba mor virtuous maen nhw'n teimlo. Mae asesu cylch bywyd yn eu graddio yn seiliedig ar faint, ac mae'r ddau drefniant yn ysgafn yn gorgyffwrdd.
Erthygl
Mae pympiau gwres yn lleihau allyriadau gwresogi bron ym mhobman, ond mae maint yr enillion yn dibynnu ar eich grid. Beth wnaeth yr astudiaethau peirianneg ei fesur mewn gwirionedd.
Erthygl
Mae dewisiadau carbon isel hefyd yn lleihau llygredd aer, yn gwella deietau ac yn cael pobl i symud. Beth ganfu'r Lancet Countdown a'r adolygiadau manteision ychwanegol.
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.
Ranking
Household footprint accounting puts heating, transport and diet far ahead of everything people usually think about.
Food
Dietary shift has real, measurable effects — and the variation within a food category can exceed the variation between categories.
Aviation
Contrails and other non-CO₂ effects roughly double aviation's warming impact, and most calculators ignore them.
Tools
They have been evaluated. Their value is educational rather than accounting — the uncertainty is very large.
Diets, drugs, behaviour and maintenance — ranked by the strength of the evidence behind them.
Coeliac disease news, guidelines and research — plus the practical business of eating.
Electric cars reviewed on real range, charging behaviour and life-cycle emissions.
Health, science and self-improvement books fact-checked against the literature they cite.
Cafodd y dudalen hon ei thrawsgrifiad yn awtomatig o Saesneg. Mae'r dyfyniadau a'r rhifau heb newid. Darllenwch y gwreiddiol Saesneg os yw unrhyw beth yn darllen yn rhy ddieithr. Darllenwch y gwreiddiol Saesneg
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