FILE - This April, 6, 2008 file photo shows Picher, Okla., nestled among huge lead-laced piles of rock. In eastern Oklahomaâ€™s Tar Creek mining district, waterways are devoid of life and elevated lead levels persist in the blood of children in 2019, despite a two-decade effort to clean up lead and zinc mines. More than $300 million has been committed since 1983, but only about 2 percent of the impacted land has been reclaimed and contaminated water continues to flow. (AP Photo/Charlie Riedel, File)