As far back as human history goes, scientists today have discovered the depletion of the ozone layer and have studied how it is caused by human actions and inventions that affect our environment and style of living. As the cause of this, many changes have been taking place during the past twenty yea...

The Ozone Layer After two decades of probing the atmosphere with a welter of instruments carried on spacecraft, weather balloons and highflying U-2 aircraft, researchers thought the case was closed: man-made chemicals known as chlorofluorocarbons (CFCs) drift into the stratosphere, break down and...