Part 1 of Essay
From far off in space, you can see our home surrounded by a blue ribbon with a faint tint. The ribbon is almost transparent and is used as a filter to protect all living organisms from the sun's hazardous radiation. It lets just the right amount of light through to supply everything with energy. We know this ribbon, or ....

Part 2 of Essay
.... molecules. One example would be chlorofluorocarbons or CFC's. CFC's were commonly found in spray cans during the early 1970's but were invented in the 1920's. They contain chlorine, fluorine, and carbon atoms which all form bonds with the rare ozone molecules. A few more products with CFC's are coolants for refrigerators and air conditioners, foam products, such as cups, and insulation for houses. Considering that ozone molecules are so rare, it is extremely important to keep them intact. Without th ....