Signs against Hydraulic Fracturing on the NY/PA border. Hydraulic fracturing is the propagation of fractures in a rock layer caused by the presence of a pressurized fluid. Hydraulic fractures may form naturally, as in the case of veins or dikes, or may be man-made in order to release petroleum, natural gas, coal seam gas, or other substances for extraction, where the technique is often called fracking[ or hydrofracking. This type of fracturing, known colloquially as a frack job (or frac job),is done from a wellbore drilled into reservoir rock formations. The energy from the injection of a highly-pressurized fracking fluid creates new channels in the rock which can increase the extraction rates and ultimate recovery of fossil fuels. The practice of hydraulic fracturing has come under scrutiny internationally due to concerns about the environmental impact, health a
Uncompressed file sizes and pixel dimensions are approximate. Grayscale images are 1/3 the file size of RGB files. Files downloaded directly from the website are compressed JPEG format. You may request a TIFF file, if available, or a larger interpolated size for your output needs. Please contact Customer Service for associated production fees.