The so-called "hole" in the earth's protective ozone layer is at a new record -- 10.6 million square miles of sky around the South Pole -- even though most nations agreed back in 1987 to phase out the chemicals that cause it.
The so-called "hole" in the earth's protective ozone layer is at a new record -- 10.6 million square miles of sky around the South Pole -- even though most nations agreed back in 1987 to phase out the chemicals that cause it.
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