The Montreal Protocol on Substances that Deplete the Ozone Layer is signed in Montreal, Canada.
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The Association of Zimbabwe Traditional Environmental Conservationists (AZTREC) is founded in Zimbabwe’s Masvingo Province.
The 1989 Convention on International Trade in Endangered Species of Wildlife Fauna and Flora (CITES) bans the international trade of African elephant ivory.
The Bangladeshi economist Muhammad Yunus founds the Grameen Bank as a new model for addressing local poverty by providing microloans.
Books by Victor Olgyay (Design with Climate) and Ralph Knowles (Form and Stability ) pioneer a “green building” movement among architects and designers.
As a result of this provision, the old-growth conifer forests of the Pacific Northwest are protected as critical habitats for the owl.
The American company Bell Laboratories develops the first operational modern solar cell.
In his 1791 work, Georg Ludwig Hartig advocates a new strategy for sustainable forest management.
British economist Thomas Robert Malthus warns of the dangers of overpopulation.
One of the first guilds in Europe is founded by silver miners in Germany’s Harz Mountains.