1. Air Pollution
... of its protective function, the ozone layer is essential to life on earth. Several pollutants attack the ozone layer. Chief among them is the class of chemicals known as chlorofluorocarbons (CFCs), used as refrigerants (notably in air conditioners), as agents in several manufacturing processes, and formerly as ... there is 25 percent more carbon dioxide in the atmosphere today than there was a century ago, the result of our burning coal and fuels derived from oil. Methane, nitrous oxide, and CFCs are greenhouse gases as well. Scientists predict that increases in these gases in the atmosp...
- Word Count: 6167
- Approx Pages: 25
- Has Bibliography
- Grade Level: Undergraduate