The water quality of a southwestern Colorado river rendered bright orange by toxic waste spewed from an abandoned gold mine one week ago has returned to pre-existing levels, the U.S.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/epa-chief-colorado-river-hit-mine-waste-back-pre-spill-quality
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/planet-ark-australia
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining-waste
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hazardous-waste
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-quality
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/colorado
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/freshwater-ecosystems