Mining

well is was hard for them every day. but they liked it.

In 2001 there were 719 underground coal mines in the United States, which produced 380.6 million metric short tons.

Ores of iron were dug up and smelted in prehistoric times. Evidence clearly estabilishes the first know working of iron from ore in India in the second millennium BC. As such, the discovery of iron and iron ores cannot be attributed to any given individual or specific time.

I think it may have changed because they went there and they might have found a lot of gold their but you might wanna go look it up on wiki they are usually a big big help.

Kazakhstan, Australia, Canada, United States, Namibia, Gabon, Niger, Malawi, South Africa, Brazil, Argentina, France, Spain, Germany, Romania, Czech Republic, Uzbekistan, China, Russia, Iran, etc.

It helps the economy by brining tax income and enable employment in local comminities

What were the major economic activities of Los Angeles

Mining began in Pre-History of the Human Race. Hunter Gatherers would often identify useful minerals, water sources, and even precious metals. Mined substances were often first found at land surface level; followed by digging deeper if necessary. Populations rapidly found use for such precious resources. In this sense Mining evolved as the Human Race evolved. Egyptian Calligraphy from 2,000 BC has provided written records of large scale mining.

Proposed by two-thirds vote in both houses of Congress and ratified by state legislatures in three-fourths of the states.

Comstock Lode

Iron ore is mined from the earth's surface and most usually by surface mining (which is relatively cheaper and efficient than underground mining). The ore is first extracted and if its quality is unsuitable to be directly used for steel making, it undergoes the process of sintering where they are made into uniform sizes. If necessary, the iron ore undergoes the process of pelletizing to remove impurities. At this stage, you "get" the iron ore suitable for steel making. /BL

black lung disease, mining cave-ins, smothering, gases in tunnels causing lack of oxygen, getting cursed out by rednecks

Uranium from from Great Bear Lake in the Northwest Territories were used in the creation of the bomb

+ many scientists both french and English participated

Strip mining of copper produces 100-10,000 mg/kg cadmium and lead.

Iron pyrites have a devastating effet of aquatic life.

Gold mining produces residual levels of CN complexes. even single ring of gold generates 20 tonnes of mining waste.Smelting and refining processes can melt metals and metalic compounds to melt. Lot of waste generated. besides, Large amount of water is taken from rivers .

Many people know that extracting metal ores from the ground damages the ground, and makes it hard for things to be grown on the ground because it has been disturbed, and soil has been removed. Also it could lead to land collapses and means that the land could collapse on villages. Also pollution could be made due to the burning furnaces which could be a contribution to global warming. There are many things that could disrupt the environment, as well as minor things, like washing the ores and leaving behind poisonous waste products.

No. All 33 miners were recovered safely. A few of them had medical issues -one had pneumonia, several had dental problems- but they were all healthy and well a few day after their rescue.

Deforestation (logging) of area to create the mine and roads to transport the mined products. That can result in loss of wildlife and or extinction of species. Chemicals and/or vapours that are produced in smelting get placed in the atmosphere. Not to mention all the resources like metal, electricity and oil/petroleum to buid a mine and support an active mine. Emissions from vehcles or tranport to transport it. The salt bit I'm not so sure about apart from the vapours and chemicals that are dispersed into the atmosphere. I guess it contributes to global warming. And as far as oil goes there is also the burn off of oil that cannot be used or isn't the appropriate grade.

Firstly the companies that do mining employ the locals for instance in Zimbabwe the Unki mine has employed thousands of people in the are . They also improve the infrastructure in the area they are located like roads , buildings and other facilities . Some of the companies also support the educational sector through offering bursaries to the best students who excellled and they also have a hand in prize giving ceremonies to schools nearby .

In the case of strip mining the process removes the surface deposit of soil and rock to expose the valuable minerals. The removal destroys the ecosystem existing in the area. The removed soil and rock has to be stored or placed somewhere. That location also loses its natural ecosystems.

Mining itself removes a natural resource from the ground depleting it.

No because there is only a certain amount of iron in the world. However the amount of iron available and its easy recyclability makes it essentially a non-exhaustible non-renewable.

There are risks associated with all mining operations. People can be injured or killed mining. These risks must be well managed, but cannot be completely avoided. But the "big picture" as regards mining is usually one that has environmental impact as its focus. Mines, particularly the large open pit or strip mines, can scar the land and heavily impact the environment. The material processing facilities also threaten the environment. Having said that, environmental concerns make up much of the down side of mining and quarrying.

Gypsum is a valuable mineral, as all minerals are. One of its most prominent and beneficial uses is in drywall (sometimes also called gypsum board) thanks to its fire retardant properties and ability to absorb heat energy. The mineral is prevalent and can be found in very large crystals commonly.

1. Uranium is a possible polluting agent of the natural environment.

2. Uranium is a toxic and a radioactive chemical element.

3. Uranium release radium and radon.

4. Radioactive wastes are dangerous and need to be isolated.

About £70,000 a year, it can go higher depending on good you are and if you have a high reputation.

require that the landscape and vegetation

of mined lands be restored