Question

Name two plants which absorb harmful pollutants from the air.

Hint:

NASA's clean air studies proved that certain indoor plants can significantly reduce common household toxins. For the best air-filtering results, pair these plants with organic potting soil to support beneficial root microbes.

Answer 1

Step 1: Understanding Phytoremediation in Indoor Environments:
Phytoremediation is the bio-engineered process by which living green plants absorb, break down, or neutralize airborne toxic compounds, volatile organic compounds (VOCs), and particulate matter. Gaseous pollutants are absorbed through the plant's stomata, travel down to the root system, and are digested by beneficial microbes in the soil.

Step 2: Identifying Key Air-Purifying Plants:
Two of the most efficient and academically recognized air-purifying indoor plants are:

• Snake Plant (Sansevieria trifasciata):
  • Target Pollutants: Highly efficient at removing formaldehyde, nitrogen oxides ($NO_x$), benzene, xylene, and trichloroethylene from enclosed environments.
  • Biological Advantage: Performs Crassulacean Acid Metabolism (CAM), meaning it opens its stomata and absorbs carbon dioxide and pollutants at night while releasing oxygen.
• Spider Plant (Chlorophytum comosum):
  • Target Pollutants: Renowned for rapidly removing carbon monoxide ($CO$), formaldehyde, and industrial solvent residues like xylene from indoor air.
  • Biological Advantage: Extremely resilient, safe for pets, and features a high transpiration rate that helps regulate indoor humidity.