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Steve- Surface mining is very dangerous.
Advantages:
- Subsurface mining is safer
- Subsurface mining is cheaper,
- Subsurface mining is faster
Of course, it depends what type of mining you are referring to, the location, the material, etc.
The most common and obvious advantage to any mining is purely economical- money, and whatever material is being mined (Like mining coal for fuel).
And the most significant drawback is environmental- Mining, in general, is terrible for the environment (Some types of mining more than others). However, mining usually invoves the complete destruction and devastation of whatever environment it is in. This can become very controversial, like the Cheviot mine in Alberta, Canada.
The advantages and disadvantages of mining can be determined based on facts uncovered by scientists and by personal opinions. One definite advantage is the fact that it brings in large amount of profits for the companies doing the mining. It also provides employment for people who are unemployed in the mining regions. Mining for gold, coal and other ores are valuable because they are useful in manufacturing useful consumer products. The country will also benefit from the taxes being paid by the companies conducting the mining excavations. On the other hand there is a downside to mining. One of the main disadvantage is deforestation. Many of the forests and trees are being destroyed for the sole purpose of extracting valuable minerals. It has also caused pollution in the mining areas. The rivers and lakes are being polluted. The pollution has caused danger to wildlife and human beings that inhabit the mining regions. Mining is definitely a controversial issue and the advantages and disadvantages should always be weighed.
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Why opencast mining is cheaper for companies?
because opencast mining doesnt require shafts and tunnels to be built unlike other approaches such as deep mining. it is on the surface so transportation costs from underground to ground level do not exist. insurance costs for miners may be lower as there is no risk of the mine 'caving in'.
How does the amount of heat energy reflected by a smooth dark-colored concrete surface compare with the amount of heat energy reflected by a smooth ligh-colored surface?
The dark coloured concrete surface absorbs more heat energy and therefore reflects less heat energy.
How do you minimize effects of mining?
How do you minimize the harmful effects of mining?
How would the colors in a satellite image of an area compare with a color photograph of the same area?
The satellite image will have more realistic surface of the Earth compared to photograph.
Compare the causes and effects of deep currents and surface currents?
deep currents form when dense water neat the poles sinks and flows slowly along the ocea floor
