Ozone layer under attack again says new study

This year marks the 30th anniversary of the Montreal Protocol, an international agreement that limited the use of chemicals, like chlorofluorocarbons, that were found to deplete the ozone layer, a protective area of the Earth’s stratosphere that shields us from most of the sun’s UV radiation. By all accounts, the accord has been successful and our ozone layer is on the mend. Yet the new study warns that dangerous chemicals are being swept into the upper atmosphere where they may undo some of the good that has come from the Protocol.

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