Rowland, F. Sherwood

In full  Frank Sherwood Rowland   American chemist who shared the 1995 Nobel Prize for Chemistry with chemists Mario Molina and Paul Crutzen for research on the depletion of the Earth's ozone layer. Working with Molina, Rowland discovered that man-made chlorofluorocarbon (CFC) propellants accelerate the decomposition of the ozonosphere, which protects the Earth from ultraviolet

World War I, Rival strategies and the Dardanelles campaign, 1915–16

Erich von Falkenhayn had succeeded the dispirited Moltke as chief of the German general staff in September 1914. By the

Alliance

In international relations, a formal agreement between two or more states for mutual support in case of war. Contemporary alliances provide for combined action on the part of two or more independent states and are generally defensive in nature, obligating allies to join forces if one or more of them is attacked by another state or coalition. Although alliances