Scientists create a mineral in the lab that captures carbon dioxide

[Igel]

4. In this case they're using olivine.

Which may alter the energy inputs necessary. If they could use solar, then there's even less CO2 emitted in order to sequester CO2.

I like the idea of fertilizing parts of the ocean to produce more photosynthetic algae in order to sequester organic compounds on the ocean floor. Sort of what led to oil formation in the first place. Then again, that typically also winds up sequestering calcium carbonate, and while that does pull carbon out of the oceans it'll eventually lead to not so much calcium dissolved in the sea water.