Fracking can release dangerous petroleum hydrocarbons, including benzene, toluene and xylene. It can also increase ground-level ozone, a key risk factor for asthma and other respiratory illness.
Fracking often releases large amounts of methane, a highlypotent greenhouse gas that traps heat at least 86 times more effectively than carbon dioxide over a 20-year period. Fracked shale gas wells, for example, may have methane leakage rates of as high as 9 percent
Fracking comes with intense industrial development, including multi-well pads and massive truck traffic. That’s because, unlike a pool of oil that can be accessed by a single well, shale formations are typically fractured in many places to extract fossil fuels. This requires multiple routes for trucks, adding more pollution to the air and more disturbance of wildlife habitat.