In clackamas, oregon, a stand of hybrid poplar trees was planted on an area of land that is contaminated with volatile organic compounds (vocs). why would someone purposely plant trees in an area with contaminated soil?

Hybrid poplar trees can absorb volatile organic compounds through their stomata, thereby filtering them

Explanation:

It is well known that trees play a key role by purifying the air of CO2 and releasing oxygen. Moreover, trees are also capable of absorbing and filtering different types of harmful gases such as ammonia and sulfur dioxide, thereby forestation of larger areas may result an interesting strategy to clean the air from toxic pollutants

thinking it would be d not too sure but i think it's right