Can Dirty Air Do The Ozone Layer's Job?

These days, practically all the news about the ozone layer is bad. Scientists have discovered that the now-famous hole over Antarctica is getting bigger and lasting longer each year, allowing more damaging ultraviolet light to reach the earth. And they know the stratospheric ozone layer is shrinking over the U. S. and other temperate-zone nations even in summer -- a trend that could mean more skin cancer and crop damage.

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