Mining

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

Erosion, formation of sinkholes, loss of biodiversity, especially marine life, and contamination of water bodies are some of the environmental issues cause by mining. Soil erosion is prominent as mines are reclaimed when they are closed down. This will cause an instability in the soil, which is prone to erosion whe there is a heavy rain. Soil and other minerals from the mine also run into water bodies, contaminating them and destroying marine life.

When you are mining you could cut yourself in the process and die.

Mining has several bad effects. It leaves behind a huge hole after mining is done. Secondly it damages natural beauty. A beautiful landscape which once existed is now a huge piece of dug up earth. The main effects are that trees are cut down, and forests are deforestated. for 1. This brings up the amont of CO2 in the air because that's what trees use up and what we exhale, and secondly it means it is a loss of habitats. Birds, insects squirrels and other wildlife which habitated there now no longer have homes. Even some people rely on trees to use as fuel wood to cook on, heat water on and to stay warm.

Metals are sprayed with toxic chemicals to extract the metal from its ore, or to galvanise the metal. All these processes contribute to global warming which is becoming worse by the minute!

It can also,make the air of public opoin bad which can make wildlife die.

Mining is a way to obtain necessary and useful things from below the ground. Without mining, modern life as we know it would not be possible. Too many of the things we must have come from the ground. Coal and metal ores are particularly high on the list. Agregates, the rocks and minerals we use to build with, are mined. The list goes on....

there are a lot of environmental problems one is hurting the land, by taking the earth away from its usual spot, another with water, the water gets taken out of the mining spot, another is air, the oxygen is taken out of the place where you are mining and then there is the other waste materials such as pollution. i hope this answers your question. :-)

A case could be made for all areas where bauxite is found to be environmentally sensitive. Mining can be be devastating to the environment of an area. Lots of reclamation is needed to "put things back" as they were. But restoring plants can be difficult, particularly in a rain forest like the Amazon. That puts Brazil at the head of the list, and Guinea second. India has sensitive areas, too, though not rain forest, and you can add it third.