United Nations: A Safer Zone For the Ozone

A Safer Zone For the Ozone

Fifteen years ago, scientists began noticing that the earth's protective ozone layer was being depleted by a group of chemicals known as chlorofluorocarbons. They warned that deterioration of the ozone, which blocks the sun's harmful ultraviolet rays, could lead to an increase in skin cancer and disastrous climatic changes, including an overall warming of the earth's atmosphere.

Despite strong anti-CFC laws in the U.S. and Canada, many countries . continued to allow the compound to be used as a propellant in aerosol products and as a cooling agent in refrigerators, air conditioners and other appliances. Finally, last week representatives of 31...

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