This Earth Literacy Concepts in Math Courses lesson plan also includes:
Students are given word problems to become aware of the environment and show them how to preserve it. They are giving a list of a few word problems: A community has 25,000 houses, each off which has (on the average) two toilets. Each is flushed (on the average) three times daily. If the old toilet tanks are replaced by new ones, which hold one gallon of water less, how much water can be saved in one year?