Greenpeace International" (officially Stichting Greenpeace Council) based in Amsterdam, Netherlands, and 26 regional offices operating in 55 countries. The regional offices work largely autonomously under the supervision of Greenpeace International. The executive director of Greenpeace is elected by the board members of Greenpeace International. The current directors of Greenpeace International are Bunny McDiarmid and Jennifer Morgan and the current Chair of the Board is Ana Toni. Greenpeace has a staff of 2,400 and 15,000 volunteers globally. Each regional office is led by a regional executive director elected by the regional board of directors. The regional boards also appoint a trustee to
Greenpeace Sciences supported the ozone "depletion hypothesis." Its suffering large losses from chlorinated and nitrogenous compounds was reported in 1985. Earlier studies had led some countries to enact bans on aerosol sprays, so that the Vienna Convention was signed in 1985 the Montreal Protocol was signed in 1987 to go in force two years later. The use of CFCs and HCFCs in refrigeration were and are among the banned technologies. A German technological institute developed an ozone-safe hydrocarbon alternative refrigerant which came to a Greenpeace campaigner's attention in around 1992. The rights to the technology were donated to Greenpeace, which maintained