Traffic pollution is a growing concern in urban areas, but strategically chosen plants in outdoor plant boxes can help mitigate its effects. Certain plants excel at absorbing harmful pollutants like nitrogen dioxide, carbon monoxide, and particulate matter, making them ideal for city dwellers.

1. English Ivy (Hedera helix) – This hardy vine is highly effective at filtering benzene and formaldehyde from the air. Its dense foliage also traps dust particles.

2. Spider Plant (Chlorophytum comosum) – Known for its resilience, the spider plant absorbs carbon monoxide and xylene, thriving even in low-light conditions.

3. Bamboo Palm (Chamaedorea seifrizii) – A natural air humidifier, this palm removes benzene and trichloroethylene while adding a tropical touch to urban spaces.

4. Snake Plant (Sansevieria trifasciata) – Often called the "bedroom plant," it’s excellent at absorbing nitrogen oxides and works well in compact plant boxes.

5. Lavender (Lavandula) – Beyond its soothing fragrance, lavender helps reduce ozone levels and attracts pollinators, supporting urban biodiversity.

For optimal results, combine these plants in outdoor plant boxes near high-traffic areas. Regular watering and occasional pruning will enhance their pollution-absorbing capabilities. By integrating these green solutions, cities can combat pollution while adding aesthetic and ecological value to their landscapes.