Lake Geneva to swim at some beaches of the lake; indeed, visibility under water was near zero. By the 1980s, intense environmental pollution (eutrophication) had almost wiped out all the fish. Today, pollution levels have been dramatically cut back, and it is again considered safe to swim in the lake. Major leisure activities practiced include sailing, wind surfing, boating (including water skiing and wakeboarding), rowing, scuba diving and bathing. On a scientific footnote, in 1827, Lake Geneva was the site for the first measurement of the speed of sound in (fresh) water. French mathematician Jacques Charles François Sturm and Swiss Physicist Daniel
French name French name This article describes the conventions for using people's names in France, including the norms of custom and practice, as well as the legal aspects. In normal polite usage, a person's name is usually preceded by: Since 2013, French administration does not use the term "mademoiselle" anymore for its documents in favour of "madame" regardless of the status and the age of the woman addressed. During the "Ancien Régime", a female commoner was always addressed as "mademoiselle", even when married, "madame" being limited to women of the high nobility, even if they were not married. This practice ceased after