A Green Warrior community wants to naturally purify municipal wastewater without using heavy chemicals. They build a shallow, engineered pond system filled with aquatic plants like cattails and reeds. What is this eco-friendly treatment setup called?

Answer: C. Constructed Wetland

• Answer: C
• Explanation: A Constructed Wetland is a nature-based engineering solution. It uses natural processes involving wetland vegetation, soils, and their associated microbial assemblages to filter sediment, absorb excess nutrients (like phosphorus and nitrogen), and degrade pollutants from wastewater organically.

Answering after opening this box earns no Practice Points.