Find out how water pollution affects us. Have the children pour an inch of red food coloring into a glass. Then have them pour one inch of water into the glass. Stand a stalk of celery or a white flower into the glass. Let it stand overnight to see how the plant has absorbed the red water.
Polluted water is absorbed in plants the same way.
Discuss with the children how we can reduce the amount of pollutants getting into our plants and eventually to us. Make a Mini-Landfill. Bury the filled pantyhose at least 8' deep, away from saturated soils. Mark the spot. After three months have passed, dig up the pantyhose from the ground and remove the contents carefully.