Human Health and Hydraulic Fracturing Current public health research is examining the adverse health effects of hydraulic fracturing on community members. This research is focused on evidence-based research into processes, procedures, materials, and cleanup from drilling and operating a well. In recent years, several states such as Maryland and New York have called for the creation of special advisory commissions to examine the potential negative community health implications if moratoriums were lifted and fractures were allowed to begin. Much of the previous research conducted focused on the anecdotal perspective of adverse health effects. This perspective offers no scientific verification that fracturing processes are causing them or evidence where the contamination is coming from. Contamination from the hydraulic fracturing process There are many potential negative health impacts caused by chemicals used at the drilling site, which are often unintentionally released into the environment afterwards. These chemicals are dangerous and, as Witter et. al. (2008) state that “some of the chemicals used in this process are brought to the surface, potentially contaminating soil, air and water, while some of the chemicals are left underground, potentially in underground aquifers” (4) . This makes it difficult to pinpoint which chemicals cause effects and where they come from. Another piece of the puzzle is that drilling companies do not disclose the full list of chemicals, so there is a great mystery about which chemicals and what concentrations are used in the process (Lauver 2012:383). However, recently researchers have begun to break down the chemical identities and concentrations. There is a middle... half between the paper... and Colorado." Environment and Health Abstracts. National Institute for Health, nd Web .Kovats, Sari et al. "The health implications of fracking." Lancet 383.9919 (2014): 757– 8. Web.Lauver, Lori S. 2012. “Environmental Health Defense: An Overview of Natural Gas Drilling in Northeastern Pennsylvania and Implications for Pediatric Nursing.” 27(4):383–89 Retrieved February 24, 2014 (http://www.ncbi.nlm.nih.gov/pubmed/22703686).McKenzie, Lisa M., Roxana Z. Witter, Lee S. Newman e John L. Adgate 2012. “Assessing Human Health Risk from Air Emissions from Unconventional Natural Gas Resource Development.” Total Environmental Science 424:79–87 (http://www.ncbi. nlm.nih.gov/pubmed/22444058). Olmstead, Sheila M et al. “Impacts of Shale Gas Development on Surface Water Quality in Pennsylvania.” PNAS 110.13 (2013): 4962–4967.