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After the dramatic discovery of the ozone hole in 1986, activists, particularly working with Greenpeace, campaigned for an international ban on the use of ozone-depleting chlorofluorocarbons, often used in refrigeration. In 1987 country representatives in the United Nations wrote the Montreal Protocol to the Vienna Convention for the Protection of the Ozone Layer as an international treaty calling on countries to phase out and ban chlorofluorocarbons. 

In 1976,
the Hydro Electric Commission of Tasmania solidified their plans with the
Australian government to build a dam across the Franklin and Gordon Rivers, in
the Franklin-Gordon Wild Rivers National Park. The Tasmanian Wilderness Society
formed not long after this announcement to take action against the Hydro
Electric Commission and their plans to bulldoze the surrounding wilderness for
the construction of the dam. The director of the Wilderness Society and leader
of the anti-dam campaign for the following seven years was Bob Brown, a local