Comment by ClumsyPilot
7 months ago
> If we lower the CO2 levels (carbon sequestering
This is simply fantasy. Sequestering carbon mechanically is an energy losing process. It is also inefficient.
If we burned oil in year 2,000 at (generously) 50% efficiency, it will cost us 4X more in year 2040 to sequester it at 50% (very generous) efficiency.
On the face of it, we would need a sequestering industry that is 4X bigger than the oil industry, and it will be just losing money. Politically, it’s just not going to happen.
Natural sequestration (I.e. tree planting) is not enough by a very large margin (like over 10x)
Restoring CO₂ levels will use plenty of money and energy, however it's done. It can still be very much worth doing!
I don't believe much in tree planting, since it uses up huge areas of the planet forever.
The best way is to separate out CO2 from the atmosphere and pump it into underground cavities. This is the just reversing natural gas extraction, which means it's well established tech. Aside from the separating CO2 part, but that's being worked on.
In a decade or three I expect solar powered machines like this slowly but surely turning the atmosphere back to normal.