1. Depletion Of The Ozone Layer
... layer in the stratosphere, about 15 to 30 kilometers above the Earth's surface. Ozone is a molecule containing three oxygen atoms. It is blue in color and has a strong odor. Normal oxygen, which we breathe has two oxygen atoms and is odorless. Ozone is much less common than normal oxygen. ... is thinning. In some regions it vanishes almost entirely for a few weeks every year. Although CFC use has been greatly reduced in recent years, CFC molecules already released in the lower atmosphere will be making their way into the stratosphere and further ozone depletion is expected. As a result ...
- Word Count: 2746
- Approx Pages: 11
- Grade Level: High School