Possible school experiment to show importance of wetlands/riparian zones! This shows the importance of plants in our soil. Plants like trees and grasses help purify ground water. Without them the ground water gets polluted and harder to clean and drink.
Earth Day Experiment ~ Can You Undo Water Pollution? In this experiment the kids learned just how hard it is to undo water pollution. a bucket of clean water, some household trash, vegetable oil (to stand for toxic oil spills), tongs, and a strainer.