30 years ago the world pledged to fix the ozone layer. And it worked


Could the Montreal Protocol be the world’s most successful treaty?

In 1987, countries around the world came together to sign it.

Their mission?

To save the ozone layer.

Auz 6fThe Montreal Protocol marks its 30th anniversary on 16 September 2017, the UN’s International Day for the Preservation of the Ozone Layer.

The celebration is all the more special, because the treaty worked.

  • Health benefits

Thanks to the treaty, more than 135 billion tons of carbon dioxide-equivalent emissions were prevented from reaching the atmosphere between 1990 and…

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