Columbia Encyclopedia

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Denver

(Encyclopedia)Denver, city (2020 pop. 715,522), alt. 5,280 ft (1,609 m), state capital, coextensive with Denver co., N central Colo., on a plateau at the foot of the ...

conservation of natural resources

(Encyclopedia)conservation of natural resources, the wise use of the earth's resources by humanity. The term conservation came into use in the late 19th cent. and referred to the management, mainly for economic rea...

Great South Bay

(Encyclopedia)Great South Bay, arm of the Atlantic Ocean, c.45 mi (72 km) long, between the southern shore of Long Island and offshore barrier islands, SE N.Y. With the rapid population growth along its shores, the...

Salton Sea

(Encyclopedia)Salton Sea sôlˈtən [key], saline lake, 370 sq mi (958 sq km), northern part of the Imperial Valley, SE Calif.; 232 ft (71 m) below sea level. The area was anciently the northern part of the Gulf of...

gasoline

(Encyclopedia)gasoline or petrol, light, volatile mixture of hydrocarbons for use in the internal-combustion engine and as an organic solvent, obtained primarily by fractional distillation and “cracking” of pet...

airplane

(Encyclopedia)CE5 A. Side view of jet-propelled airplane B. Top view airplane, aeroplane, or aircraft, heavier-than-air vehicle, mechanically driven and fitted with fixed wings that support it in flight thro...

Clinch

(Encyclopedia)Clinch, river, c.300 mi (480 km) long, formed by the junction of two forks in SW Va., and flowing generally SW across E Tenn. to the Tennessee River at Kingston. Its waters and those of its tributary,...

Ontario, Lake

(Encyclopedia)Ontario, Lake, 7,540 sq mi (19,529 sq km), 193 mi (311 km) long and 53 mi (85 km) at its greatest width, between SE Ont., Canada, and NW N.Y.; smallest and lowest of the Great Lakes. It has a surface ...

Indawgyi

(Encyclopedia)Indawgyi, largest lake in Myanmar, c.100 sq mi (250 sq km), in Kachin State, 65 mi (105 km) WSW of Myitkyina. Indawgyi has a maximum length of 15 mi (24 km) and maximum width of 8 mi (13 km). The lake...

Carson Sink

(Encyclopedia)Carson Sink, swampy area, c.100 sq mi (260 sq km), W Nev.; a remnant of ancient Lake Lahontan. Fallon National Wildlife Refuge is located there. The Carson River (c.125 mi/200 km long), fed by melted ...