According to a report released by the U.S. Government Accountability Office the estimated cost to clean up 19 sites contaminated by nuclear waste has risen by nearly $1 billion. Officials say that inflation is partially to blame for the cost as well as uncertainties surrounding the cleanup. The report claims four sites have “complicated cleanup remedies or large amounts of contamination.” Two of these sites are in New York while the others are in Armstrong county, Pennsylvania, and in the St. Louis Area. These sites are responsible for around three fouths of the cost increase.