Автор работы: Пользователь скрыл имя, 25 Ноября 2015 в 13:08, реферат
USA provided by oil, natural gas, uranium ores, iron, titanium, vanadium, copper, lead, zinc, molybdenum, tungsten, beryllium, lithium, gold, silver, phosphates, potassium salts, boron, fluorite, sulfur, barite. At the same time, the country has almost no own reserves of manganese and chrome ore, gas, bauxite ores of nickel, cobalt, mercury, antimony, tin, tantalum and niobium, asbestos. Reserves of copper, manganese, nickel, cobalt, etc. can be significantly increased through the use of low-grade ores and ores from the ocean floor. With 40 main kinds of minerals only 18 US self-sufficient in 50% or more.
Introduction…………………………………………………………..…… 2
I. Natural resources of USA and their details………………………...…… 4
II. The World natural resources…………………………………………… 11
III. Conclusion …...……………………..………………………………... 19
IV List of the literature…………………………………………………… 20