NASA: Environmental disaster avoided on ozone loss

WASHINGTON (AP) -- Here's rare good news about an environmental crisis: We dodged disaster with the ozone layer. A NASA study about ozone-munching chemicals from aerosol sprays and refrigeration used a computer model to play a game of what-if. What if the world 22 years ago didn't agree to cut back on chlorofluorocarbons which cause a seasonal ozone hole to form near the South Pole?...

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