The International Day for the Preservation of the Ozone Layer is celebrated.
On 16 september 1987, the Montreal Protocol was established as an international treaty to protect the ozone layer against the use of substances which destroy it, such as halogenated hydrocarbons.
After a number of revisions, the Protocol was ratified by most countries, making it one of the most succcessful pieces of environmental legislation ever.
The calendar you're trying to add has already been added to this event.
This is not a valid number
You are about to leave this page. Any changes you made will not be saved.
Are you sure?
What kind of event would you like to create?