People descovered that the loss of the ozone given by the reaction was too slow.
The Ozone was first noticed in Anartica.
Two chemists predicted that chemicals would seriously damage the ozone layer.
Two chemists predicted that chemicals would seriously damage the ozone layer.
The first measurement for the Ozone
In Montreal people created the world's first environmental convention.
A team later returned from the Antarctic to reveal the cause of the ozone hole which was human-produced chlorine and bromine molecules escaping to the stratosphere.
A meeting in London voted for a strengthened Montreal Protocol under which CFCs, halons and other ozone-destroying chlorine compounds would be phased out by 2005 (most would be phased out by 2000).
The ozone hole was the largest hole recorded.
Around this time well be expecting the ozone hole to be destrorying.