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California has quite a few composting landfills. So GP is calling for the same technology that's already used in parts of California, perhaps covering more people than the entire population of Norway (5.4 million people)

Map of composting facilities in California: https://www.biocycle.net/2018/03/12/california-composting/






Composting is aerated, generates soil and CO₂, not methane. Anaerobic digestion generates methane and soil, though AFAIK of a lesser quality. Per article, California does have AD facilities, though doesn't mention composting/AD ratio.

We can speculate what punnerud meant, but I would point out that Norway has some kind of a landfill ban. IIUC, they have (almost) no classical mixed-use landfills, and nearly all landfilled organic waste is actually in an anaerobic digestion or composting "facility".




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