How we get oil & other natural gas
Surface Mining and Subsurface Mining
surface mining is when soil and rock overlying the mineral deposit are removed. Strip mining, open-pit mining and mountaintop removal mining are all examples of surface mining.
Subsurface mining is extraction of minerals from underground. Subsurface mining is Very dangerous conditions can include collapses, released gases, particulates in the air, low oxygen, and heat.
Types of Mining
Placer mining when raw materials are put into gravel or sand or on the surface. Water is polluted and also is withdrawn from the streams.
Hardrock Mining is when soild rock is dug into to fine minerals. This causes sinkholes and erosions.
surface mining technique of extracting rock or minerals from the earth by their removal from an open pit or borrow. Open pit mining causes water loss in the streams and can also add pollution to the groundwater.