In 1987, the World Commission on Environment and Development published a report advocating a radically different approach and introduced the concept of "sustainable development," which it defined as development that must "meet the needs of the present without compromising the ability of future generations to meet their own needs". However, it was at the 1992 Earth Summit in Rio de Janeiro, Brazil, that the concept truly took shape. The French term is a translation of the English expression sustainable development. Rendering sustainable as "soutenable" in French, as some have suggested, would be a mistranslation. Here, it means "viable and capable of lasting." Admittedly, the French adjective "durable" is somewhat narrower than the English word, but it is certainly the least unsatisfactory choice: it implies that the future is not being jeopardized and that development can continue in years to come. Both the French adjective and its English counterpart were used in the 19th century by forest administrators concerned with managing forests without jeopardizing their future. It just goes to show: the vocabulary, at least, is sustainable!