Sun tanningSun tanning or tanning is the process whereby skin color is darkened or tanned. It is most often a result of exposure to ultraviolet (UV) radiation from sunlight or from artificial sources, such as a tanning lamp found in indoor tanning beds. People who deliberately tan their skin by exposure to the sun engage in a passive recreational activity of sun bathing. Some people use chemical products which can produce a tanning effect without exposure to ultraviolet radiation, known as sunless tanning.
Nitrous oxideNitrous oxide (dinitrogen oxide or dinitrogen monoxide), commonly known as laughing gas, nitrous, nitro, or nos, is a chemical compound, an oxide of nitrogen with the formula N2O. At room temperature, it is a colourless non-flammable gas, and has a slightly sweet scent and taste. At elevated temperatures, nitrous oxide is a powerful oxidiser similar to molecular oxygen. Nitrous oxide has significant medical uses, especially in surgery and dentistry, for its anaesthetic and pain-reducing effects.
Bürkliplatz, ZürichBürkliplatz is a town square in Zürich, Switzerland. It is named after Arnold Bürkli, and is one of nodal points of the road and public transportation, and of the lake shore promenades that were built between 1881 and 1887. The tree-shaded square between Bahnhofstrasse and Fraumünsterstrasse is called Stadthausanlage. Bürkliplatz is situated in the historic Alpenquai area near Lake Zurich. It is immediately to the west of the Quaibrücke (Quay Bridge) which crosses the river Limmat at the outflow of the lake known as the lake shore promenades or Quaianlagen.
