A study that says fracking doesn't contaminate groundwater may be biased. That's what the University of Texas is looking into.
U.T. plans to review the study after it was revealed that the lead author is a paid board member of the plains exploration and production company.
Plains, like many other companies, uses hydraulic fracturing to drill through layers of rock to get gas and oil out.
The board member, Charles Groat, did not tell his supervisors about his position and failed to mention it in the study.
Many critics believe fracking harms the environment while industry leaders insist it's safe.