Part 1 of Essay
is another alarming problem that we have encountered through our own negligence. The earth's atmosphere consists of mostly nitrogen along with oxygen and small amounts of other gases. One of these gases, carbon dioxide, affects the temperature on the earth. The earth already contains the amount of carbon dioxide needed ....

Part 2 of Essay
.... and in aerosol spray cans, refrigerants, air conditioners, and similar objects. Like carbon dioxide, the CFCs are trapping more heat in the earth's atmosphere. CFCs have also been blamed for ozone depletion. CFCs are suspected of breaking down ozone particles that shield us from the sun's ultraviolet rays. Too many ultraviolet rays can cause cataracts and skin cancer. A hole in the ozone has been discovered over Antarctic the size of the United States. The hole is actually where the ozone has been depleted or ....