bitumen-based
51Etching — For other uses of etch or etching, see Etching (disambiguation), for the history of the method, see old master prints. The Soldier and his Wife. Etching by Daniel Hopfer, who is believed to have been the first to apply the technique to… …
52George Ball (scientist) — Dr. George F. A. Ball (August 9, 1944), pioneering road surface scientist, born at Auckland, New Zealand.Dr. Ball received his PhD in physics from Canterbury University in 1977. After a year with the Christchurch Industrial Development Division… …
53Energy policy of Russia — The Energy policy of Russia is contained in an Energy Strategy document, which sets out policy for the period up to 2020. In 2000, the Russian government approved the main provisions of the Russian energy strategy to 2020, and in 2003 the new… …
54Mining in Nigeria — The mining of minerals in Nigeria accounts for only 0.3% of its GDP, due to the influence of its vast oil resources. The domestic mining industry is underdeveloped, leading to Nigeria having to import minerals that it could produce domestically,… …
55Venezuela — For other uses, see Venezuela (disambiguation). Bolivarian Republic of Venezuela[1] República Bolivariana de Venezuela (Spanish) …
56OPTI Canada — Inc. Type Public Traded as TSX V: OPC Industry Oil and Gasoline Founded 1999 …
57environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
58Mummy — For other uses, see Mummy (disambiguation). An Egyptian mummy kept in the Vatican Museums. A mummy is a body, human or animal, whose skin and organs have been preserved by either intentional or incidental exposure to chemicals, extreme coldness… …
59Road — This article is about a route, thoroughfare or way that supports travel by a means of conveyance. For a place outside a harbor where a ship can lie at anchor, see Roadstead. For public roads, see Highway. For other routes, see thoroughfare. For… …
60Roof — A roof is the covering on the uppermost part of a building. A roof protects the building and its contents from the effects of weather. Structures that require roofs range from a letter box to a cathedral or stadium, dwellings being the most… …
