You might be interested in this: https://youtu.be/ib-D1EelH4Y

It's about a company (https://neoplants.com/ ) which genetically enhances plants and soil with a product you can buy to make them much more efficient at filtering the air. It apparently does work rather than being a placebo.

I went out to the neighborhood plant nursery and bought a spider plant and snake plant, and the CO2 ppm is now down to ambient: somewhere between 395ppm and 410ppm.