Abstract: A biowall has a support structure, an irrigation system, and a dissolution system. The support structure holds a plurality of plants thereon. The dissolution system dissolves pollutants from air into solution. Using the irrigation system, the solution with dissolved pollutants therein can then be supplied to roots of one or more plants supported by the biowall support structure. At least a portion of the dissolved pollutants supplied to the roots can be metabolized, for example, by bacteria at the roots of the plants. For example, the pollutants can include volatile organic compounds (VOCs). In some embodiments, the biowall can be constructed as a self-supporting, stand-alone unit.