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Halon the 60s
Since discovered in the 1960s Halon has been a popular and effective fire extinguishing gas used on and offshore. Halon 1301 and Halon 1211 are fire suppression gases that have been determined by scientists to cause destruction of the global ozone layer. In fact, Halon gases are the most destructive of all the ozone depleting gases.

United Nations Environment Programme
The ozone layer plays a crucial role in the screening of the sun's ultraviolet rays and is critical to man's well-being. An international agreement known as the Montreal Protocol (Montreal Protocol on Substances That Deplete the Ozone Layer) by United Nations Environment Programme - approved in 1987 and signed by many countries - established the worldwide phase-out of the production and use of Halons, along with other ozone depleting chemicals.

Some countries have taken more specific steps on their own as a result of the Montreal Protocol, to ban or restrict the use of Halons. There was a slower phase-out (to zero by 2010) of other substances (Halon 1211, 1301, 2402; CFCs 13, 111, 112, etc). This means in practical terms that in most of the world after 2010 the Halon must not be used. If entering a port with Halon gas on board ships now in most part of the world run the risk of being fined and held in detention at the port until the Halon is replaced with legal alternatives.

Video Released by UNEP 15.sep 2011
While the ozone hole has been considered by some as a solved problem, in fact its recovery is still many decades away and the effects and interactions of ozone depletion on climate change are just starting to be understood. 

On the 16th September 2011, embark on an investigative journey through the history and science of the ozone layer, the actions taken to address this major environmental threat and the consequences both for the ozone layer and climate system. 

This short film seeks out explanations and answers from the scientists closest to the issue

Video Released by UNEP 7.oct 2010

Video Released by UNEP 28.sep 2009
A video on the ozone hole, climate change and the works of the Montreal Protocol on substances that deplete the ozone layer.
The videoes are publicated on Youtube.