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Which natural resource is extracted in a process known as “fracking”?

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1. Coal
14%
2. Minerals
0%
3. Natural Gas
86%

Hydraulic fracturing, or fracking as it is known, is used to break up rock layers to release natural gas and sometimes oil. While fracking has been around for about 50 years, the practice is becoming more common and less popular. Many environmental groups claim that fracking contaminates nearby drinking water and can create local earthquakes. Learn more about fracking and decide for yourself if you think it is a safe practice.

http://www.switchenergyproject.com/topics/fracking 

http://en.wikipedia.org/wiki/Hydraulic_fracturing