My school has asked for teachers to teach 5 lessons to help us gain the status of a green school. I designed this lesson as a part of that initiative. There is power point that has some basic statistics about why we should recycle and specific things about how paper, plastic and aluminum effect our environment. After presenting the power point, I did the 6 problems listed using the percent proportion to learn how much water, oil and air pollutants we can save by recycling. This lesson can be taught at any time when you reach percents in your curriculum or you can use it as a review of a concept on Earth Day.