HOMELAND SECURITY NEWS WIRE – As the oil and gas drilling technique called hydraulic fracturing (or “fracking”) proliferates, a new study on the contents of the fluids involved in the process raises concerns about several ingredients. The scientists presenting the work yesterday at the 248th National Meeting & Exposition of the American Chemical Society (ACS) said that out of nearly 200 commonly used compounds, there is very little known about the potential health risks of about one-third, and eight are toxic to mammals. Continue reading.