I am looking for green, cost effective, low energy ideas to remove carbon monoxide from polluted air. The concept is an air scrubber that could be used in high polution areas near congested freeways. Cleaned air would be ducted into adjacent public buildings such as libraries, Internet cafes, clinics etc. This scrubber would address muliple toxins from automotive exhaust, not just CO2 (as is the most fashionable topic these days.)
My preference would be a natural plant based solution. Chlorophytum comosum (Spider Plant) absorbs CO, but a napkin calculation indicates it would take over 2000 plants to absorb the CO from a single SUV traveling 15,0000 miles per year.
What other means of natural (or at least low cost and non polluting) CO mitigation are there?
Thanks much.