The study I linked addresses that point - they suggest that "only 0–3% of the carbon from wood are ever emitted as landfill gas after several decades". I don't

The study I linked addresses that point - they suggest that "only 0–3% of the carbon from wood are ever emitted as landfill gas after several decades". I don't consider myself qualified to evaluate that claim, but it certainly seems plausible, given that wood clearly decays far slower than, for example, kitchen scraps found in household bio-waste.