Would you be willing to trade your refrigerator for an old- fashioned icebox or your air conditioner for a fan, if the survival of the planet depended on it? The problem with refrigerators and air conditioners is that they use chlorofluorocarbon (CFC), a gas which leaks into the atmosphere, destroying the ozone layer formed 10-12 miles from the earth's surface. Ozone helps keep the sun's harm