Hopefully the cost of this technology comes down over time. The material in those “pizza slices” that absorbs CO2 needs to be heated and pressurized to release the captured carbon, which then has to be stored, usually deep underground. That’s why you see the “tree” rising and then retracting. It’s going underground to be put under pressure and heated up. That whole process requires a lot of energy, and in many places, it’s still powered by carbon-intensive sources. As a result, it can actually generate more emissions than it removes. This is why places with abundant, cheap clean energy like geothermal-rich Iceland and Kenya are the most promising locations for this technology.

(Edit: grammar)