Can We Use Artificial Photosynthesis to Remove CO2 from the Atmosphere?

I just had an interesting call from a fellow in Germany who introduced me to “faux trees,” i.e., artificial photosynthesis, performed to remove CO2 from the atmosphere.

Here is one of those many cases where just because a concept doesn’t violate any laws of science doesn’t make it a good, practical idea.  If you have some PV available and you’re concerned about reducing CO2, it’s FAR better to use it to reduce your consumption of electricity that otherwise would have been generated by fossil fuels.