A new study from the Johns Hopkins Bloomberg School of Public Health has linked hydraulic fracturing — the process of pumping chemical-laced water into shale to extract the oil or gas embedded within — to premature births and high-risk pregnancies.
Think Progress, October 9th 2015
http://thinkprogress.org/climate/2015/10/09/3710635/fracking-linked-to-preterm-births/