this post was submitted on 23 May 2024
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Soil has a saturation limit beyond which it can't absorb more carbon - eventually organic matter in the soil will decay and release CO2 at the same rate that new organic matter can be added. Trees only hold on to carbon temporarily, until they die and decay and the carbon is released back into the atmosphere.
Turning a field of grass into a forest might delay the impact of one year of energy use for Microsoft, but its not a sustainable practice. How will they delay the impact the next year? What's the plan for when that carbon is inevitably released back into the atmosphere as the trees decay?
Planting trees as a means of carbon capture is snake oil, and I believe the likes of Google and Microsoft are too smart to fall for it, so that begs the question - what's their true motive for doing this?
Maybe they plan on dropping the trees into a bog.
That might work for a little while, but I suspect there is an upper limit to how many trees a bog can absorb over a given time before it stops behaving like a bog.
hügelkultur → hügelcounty → hügelstate → hügelcountry
If the biomass inside hugelkultur garden beds didn't decay, then it would just be a means of water retention. It does decay though, which enriches the soil but also releases CO2.
Hugelkultur can reduce demand for fossil carbon based fertilizer, but IDK if composting trees is economically viable without some level of carbon tax, or even logistically viable for meeting demand at the scale of modern, mechanized agriculture. It would be cool if it were though - paired with machines that run on liquid fuels created using renewable energy, fertilizer made from compost could be part of a zero net carbon system for growing food.