Tap water burnable the phenomenon is caused shale gas

Tap water burnable the phenomenon is caused by hydraulic fracturing phenomenon. Hydraulic fracturing is to use a lot of mixed chemical water in hydraulic fracture to release gas shale formations. Hydraulic fracturing is the main form of exploitation of natural gas at lightweight proppant, the technology widely spread in the United States in a decade, but americans are worried about the technology will pollute the water, which endanger the local ecological environment and residents health. And that the technology has brought great harm to the environment, including water spontaneous combustion, triggered a small earthquake, etc.