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The global economy needs more and more clean energy carriers. Natural gas seems to be an ideal response for this demand. However, extraction and production and other activities for unconventional hydrocarbon (shale gas, tight gas, coalbed methane, coal mine methane) development may cause lots of environmental and human health threats. Over the last decade, the extraction of natural gas from shale formations was widely discussed in many publications and reports (e.g. U.S. Energy Information Agency [36]). Due to the shale gas revolution, the prices of natural gas in the US dropped from more than $12 per BTU (2005–2009) to less than $3 today. Despite the optimistic prognosis of the implementation of American experiences on the European market [37, 38] all attempts have thus far been unprofitable and only a few companies have retained concessions for unconventional gas extraction. Large-scale development of unconventional gas production has an indisputable impact on life comfort and the level of environmental contamination. Complex issues of the negative influence of unconventional gas extraction have been presented in articles and government reports (e.g. NIOSH [27] [and articles: 15, 24, 25, 26]. Shonkoff et al. [35] pointed out and summarized the body of evidence associated with exposure pathways in order to evaluate the potential environmental public health impact of shale gas development. The authors identified data gaps and research limitations in the field of air quality, water contamination, toxicity and possible exposure pathways. Detailed issues concerning the impact of hydraulic fracturing of shale plays on human health were published by Finkel et al. [5, 6]. Similarly, the Law et al. [17] article discusses the potential impact of hydrocarbon extraction on public health. Werner et al. [39] published a review article based almost 110 other peer-reviewed articles, public reports or gray literature. The majority of references were focused on the short-term

Analysis of the acoustic climate during the drilling of gas wells in post-mining areas