OK, first of all, this CO2-absorbing street lamp looks super cool! Secondly, it absorbs CO2! Thirdly, 150-200 times more than a tree! OK, I’m calming down, and I realize it has a ways to go to get to actual widespread use in the real, physical, CO2-filled world.
French biochemist Pierre Calleja looks pretty serious about it.
I don’t know much about the details of all this, but it looks pretty promising to me.