The ozone layer
Emissions of ozone-depleting substances cause thinning of the protective ozone layer in the stratosphere. As a result of measures taken in Sweden and other countries, the negative impacts of ozone-depleting substances have already begun to decline.
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If human production and use of ozone-depleting substances ceases, the ozone layer may recover over time. The hole in the ozone layer can be “mended” by a variety of measures.