New NETWORKS, Part 4 – Peridotite & Soil
- Oct 5, 2021 2:53 pm GMT
Mantle Rocks are minerals that normally only exist in Earth’s Mantle, a layer that is normally starts 4 miles below the surface, and extends to almost 2,000 miles below the surface. Thus it makes up 67% of the mass of Earth. The main image for this post shows the Earth’s layers.
Rocks in this layer normally stay in this layer, but in a few locations they rise to the surface. That is the case with peridotite.
Mantle peridotite reacts with H2O and CO2 near the Earth’s surface. Note the CO2.
Thus even though there are huge deposits of peridotite above ground, it would need to be mined and pulverized to completely store CO2 in it. Not very efficient. But there is another way that might very efficient, and is capable of storing huge amounts of CO2.
If Mantle Rocks might be thought of as an exotic material, soil is definitely not. It’s everywhere: in our yards, forests, deserts, plains mountains, everywhere. We will talk about a particular type of soil, that which is used for agriculture (it too is pretty common). This soil probably has the capability to store more CO2 than peridotite, if we modify our farming practices to do so.
These two methods of Negative Emissions Technology (NET) will be reviewed in this post.
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