The US Fish and Wildlife Service is proposing a ban on lead sinkers in three Minnesota wildlife refuges in response to growing concern about contamination of lakes and wildlife. The public can comment on the proposed changes until September 10th. The Minnesota Pollution Control Agency is also concerned about lead from fishing tackle. Carol Nankivel wrote the Annual Lead report for the Minnesota Pollution Control Agency. Nankivel says that in Minnesota, researchers found about 18 percent of loons suffered from lead poisoning. In the eastern part of the U-S, that number was much higher.