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The US does the same... sometimes.

Some states(US) cap landfills with large sheets of plastic (the new ones have plastic on the bottom, making a "giant bag") and punch holes for venting methane and other exhaust gasses. They vent because the gas is flammable and having it build up under a sheet of plastic is risky. Landfills catch on fire frequently. [2]

Some sites collect the gas and burn it, but it isn't common.

You can see the venting tubes on this photo of liner repair after lightning strike...[1]

[1]https://comanco.com/blog/comanco-makes-liner-repairs-on-clos...

[2]http://www.mowastecoalition.org/resources/Documents/2018%20c...






I think (hope) GP means landfills with biological waste only, generating methane in lieu of composting. I wouldn't want to grow food on our mixed use landfills.

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".


>punch holes for venting methane

Why is parent comment saying Norway captures the methane for electricity generation while you're going we need to vent the methane because it's dangerous.

Same gas. Same landfill setup (by the sounds of it).

...why is the conclusion so different?

Does methane work differently in Norway?


Landfills burn it when they aren't equipped to power a generator with it. This also reduces the greenhouse gas impact, as the combustion byproduct is mostly plain CO2 and water. CO2 is also a greenhouse gas, but not as bad as methane.

Either way, it has to be collected and burned off.




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