2013年8月10日星期六

Shale gas development affect the air and even climate


Shale gas development will seriously affect local air quality.  shale gas  fracturing water requires a lot of power diesel engine powered, it will generate a lot of exhaust pollutants. Meanwhile, shale gas combustion emissions of nitrogen oxides, hydrocarbons, under certain conditions, will generate ozone. Ozone is a secondary pollutant, the harm is more serious than the primary pollutants. In some areas of the United States,Fracturing proppant because large-scale development of shale gas resulting from ozone pollution, has caused serious public concern.
Meanwhile, the development of shale gas may also affect climate change. While shale gas compared to coal, oil, the less carbon dioxide when burned, but its development, transportation and storage process, there are other greenhouse gases to escape. Shale gas most basic and important ingredient is methane. According to statistics,ceramic proppant from the development of shale gas to consumption throughout the life cycle of methane leaks about 3.6% ~ 7.9%, while the conventional gas only 1.7% to 6%. Methane is a stronger than carbon dioxide can cause greenhouse gases, the same mass of the two gases, methane is a greenhouse effect caused by carbon dioxide 25 times. If left unchecked, will shale gas and coal, oil as a threat to the global climate. Therefore, the greenhouse effect more serious today, concern about climate change must attach importance to the development of  shale gas  methane emissions.

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