You might be wondering this after seeing a couple of NASA viral posts recently. While NASA did do some research regarding great air-purifying plants to have, they did not necessarily test how many snake plants are needed to purify the air in a single room.
Realistically, some studies have shown that you’ll need hundreds and maybe even a thousand air-purifying plants to even see actual results - and that would be impractical!
However, rest easy knowing that snake plants help clean the air of benzene, trichloroethylene, and formaldehyde.