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Removal of toxic materials began in 1987 with 371,000 short tons (740 million lb; 337 million kg) of contaminated soils and debris removed by 2012, and restoration completed by 2015. [ 37 ] [ 40 ] The area was redesignated a national park by Congress on October 11, 2000, [ 32 ] with the passage of the Department of the Interior and Related ...
In mining, Chihuahua state is the leading producer in the republic of non-ferrous minerals and zinc, and is second nationwide in silver extraction. Agricultural production makes up only 6% of the total GSP; however, the state is the leading producer of apples, nuts, cattle and sheep raising nationally, and second in pine and oak trees harvested.