I have no idea why this has been down-voted. Sure, it's a strong opinion but that's what HN is all about.
Couple of questions:
- Do we have any estimates yet on how long olivine would take to be effective?
- Can we do HFC-capture in a similar way to carbon capture? Would this be more productive?
The CO2 capture capacity of olivine is well understood. You just need to get enough of it out there, wet, stirred, and exposed to air or surface water, i.e. on beaches. It will take many millions of tons, but we have that, or access to it.
Of course it would do little good if we continued pumping CO2 into the atmosphere at an increasing rate at the same time.
Getting the SF6 out of the atmosphere is a tougher nut. The present load already accounts for 10% of forcing. There are current efforts to phase out its use, and suck it out of the equipment it is used in.
The HFCs in current use, if all vented, would have as strong an effect as all the CO2 currently in the atmosphere. Collecting it all up and destroying it is a huge responsibility. Probably most that is in cars, window A/C units, and refrigerators will end up vented.
Couple of questions:
- Do we have any estimates yet on how long olivine would take to be effective? - Can we do HFC-capture in a similar way to carbon capture? Would this be more productive?