active effluent system
51Sediment Profile Imagery — (SPI) is an underwater technique for photographing the interface between the seabed and the overlying water. The technique is used to measure or estimate biological, chemical, and physical processes occurring in the first few centimetres of… …
52Qatar — Qatari, adj., n. /kah tahr, keuh tahr /, n. an independent emirate on the Persian Gulf; under British protection until 1971. 665,485; 8500 sq. mi. (22,000 sq. km). Cap.: Doha. Also, Katar. * * * Qatar Introduction Qatar Background: Ruled by the… …
53People's Republic of China — Infobox Country native name = zh. 中华人民共和国 (Simplified Chinese characters) zh. 中華人民共和國 (Traditional Chinese characters) Zhōnghuá Rénmín Gònghéguó conventional long name = People s Republic of China common name = People s Republic of China symbol… …
54Soil — For other uses, see Soil (disambiguation). A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; the bottommost layer represents bedrock …
55Garbage disposal — A garbage disposal, waste disposal unit, or garburator / garbarator (Canada) is a device, usually electrically powered, installed under a kitchen sink between the sink s drain and the trap which shreds food waste into pieces small enough to pass… …
56airport — airport1 /air pawrt , pohrt /, n. a tract of land or water with facilities for the landing, takeoff, shelter, supply, and repair of aircraft, esp. one used for receiving or discharging passengers and cargo at regularly scheduled times. [1915 20;… …
57Green sea turtle — Chelonia redirects here. It is also the name of the superorder uniting turtles, tortoises and terrapins (Testudines) with the proto turtle Australochelys. Green sea turtle Chelonia mydas swimming above a Hawaiian coral reef …
58Lake Tahoe — Tahoe redirects here. For other uses, see Tahoe (disambiguation). Lake Tahoe Lake Tahoe from the east shore (in Nevada) Location California and Nevada,USA …
59Calumet River — The Calumet River refers to a system of heavily industrialized rivers and canals in the region between the neighborhood of South Chicago in Chicago, Illinois, and the city of Gary, Indiana.BackgroundAs of September 16, 2008, areas of Lake and… …
60Urine — (from Latin Urina, ae, f.) is a typically sterile (in the absence of a disease condition)[1] liquid by product of the body that is secreted by the kidneys through a process called urination and excreted through the urethra. Cellular metabolism… …
