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Why does subsurface mining have less of an environmental impact than surface mining?

Why does subsurface mining have less of an environmental impact than surface mining? Subsurface mining does not produce acid mine drainage.

What is a surface hazard resulting from subsurface mining?

It is sometimes caused by subsurface mining. Mining of the surface can result in severe erosion by wind and water. It can pollute streams with sediment. It results in toxic wastes percolating down to groundwater. It also pollutes the air with dust and toxic substances.

Which mining technique creates a large visible pit or hole in the ground and is used when the resource is close to the surface but extends beneath the surface both horizontally and vertically?

Open-pit mining

What is the difference between surface mining and deep mining?

Underground mining is used for small, high-grade deposits covered with a thick soil or rock above the ore. surface mining is commonly used to extract coal and copper. Underground mining is used for zinc, lead, and increasingly coal. Alluvial mining is used for precious metals like gold and diamond.

Is strip mining safe?

On a production basis, comparing fatalities per million tons, strip mines are over four times safer than underground mines; and on an exposure basis, comparing fatalities per million man hours, strip mines are approximately twice as safe.

How area strip mining is done?

Area Stripping extracts ore over a large, flat terrain in long strips. The overburden of rocks and soil is dropped in the previous strip so that long gaps aren’t left in the earth after mining is complete.

How is mining harmful to the environment?

The extraction of minerals from nature often creates imbalances, which adversely affect the environment. The key environmental impacts of mining are on wildlife and fishery habitats, the water balance, local climates & the pattern of rainfall,sedimentation, the depletion of forests and the disruption of the ecology.

Can mining be environmentally friendly?

Choosing environmentally friendly general mining processes. In situ mining, for example, can be more environmentally friendly than underground mining and is cheaper than many mining methods. Research and development of green mining technology in the areas of processing, clean water, and energy efficiency.

How can we make mining safer for the environment?

To make mining environmentally friendly, we can:

  1. Use reusable waste to build.
  2. Come up with better regulations and legislation.
  3. Do away with mining.
  4. Improving environmental performance.
  5. Close illegal and unregulated mines.
  6. Accurate tallying of toxic mining waste.

Why is copper mining bad for the environment?

Waste Generation Copper mining wastes make up the largest percentage of metal mining and processing wastes generated in the United States. If pyrites and sulfides are exposed to the air and water, they may form sulfuric acid that will mobilize many metals including uranium, which is highly soluble in acid.

How does copper affect human health?

Long-term exposure to copper can cause irritation of the nose, mouth and eyes and it causes headaches, stomachaches, dizziness, vomiting and diarrhea. Intentionally high uptakes of copper may cause liver and kidney damage and even death. Whether copper is carcinogenic has not been determined yet.

Is copper eco friendly?

Copper’s superior thermal and electrical conductivity, combined with its 100% recyclability make copper a truly green material perfect for building a sustainable world.

Where is the largest copper mine in the world?

Chile