Can activated carbon really remove formaldehyde?
Are activated carbon and green plants useful? Yes, but the effect is limited. Why do you say so?
Because formaldehyde concentration depends on the source of formaldehyde emission. If formaldehyde cannot be eliminated from the source, it will still be released after a period of time if it is removed once and for all. If you want to rely on these plants and activated carbon to remove formaldehyde, you need to not only pile them up at the source of formaldehyde release, but also replace them regularly. It is not realistic in terms of efficiency or quantity and can only be used as an auxiliary.