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Benefits And Disadvantages Of Placer Mining

causes, effects and solutions for mining -,for mining purposes, big machines are often used in order to make the mining process more effective and to reduce the physical work for miners. however, these machines emit large amounts of harmful gases, also including greenhouse gases like methane or co2..24 major advantages and disadvantages of coal,various mining processes are used to harvest coal from its underground deposits, but only two methods are primarily used: deep mining (underground) and surface mining (opencast). more than 7.2 billion tons of hard coal are currently produced annually through these mining methods..5 pros and cons of strip mining | flow psychology,5 pros and cons of strip mining materials such as coal and tar sand are located relatively near the surface of the earth. the method to recover such materials is called strip mining, a form of surface mining where surface vegetation, soil and rocks are removed in strips and often times together with controlled explosions in order to make the.investment advantages of placer gold mining,investment advantages of placer gold mining. placer gold mining has a number of advantages for investors. some of these advantages are as follows: * the amount of income generated can be controlled while assets are accumulated. gold from production can be.

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