See the entire recorded testimony to the Colorado Oil and Gas Conservation Commission below.
Also see this recent article:
"..Beau and a dozen other infants died in this oil-booming basin last year. Was this spike a fluke? Bad luck? Or were these babies victims of air pollution fed by the nearly 12,000 oil and gas wells in one of the most energy-rich areas in the country? Some scientists whose research focuses on the effect of certain drilling-related chemicals on fetal development believe there could be a link."