http://environment.newscientist.com/article/dn12505-modernday-gold-rush-threatens-grand-canyon.htmlSome of the most beautiful national parks in the US are threatened by a mining boom prompted by soaring metal prices, according to an analysis of government data. Areas surrounding iconic locations in the western US such as Yellowstone National Park and the Grand Canyon risk being intensively mined in coming years, says the Environmental Working Group (EWG), a non-profit research organisation based in Washington DC.
Its study draws on data from the government’s Bureau of Land Management to identify 2900 new mining claims that have been staked within five miles of national parks since 2003. "This is a modern-day land rush," says Dusty Horwitt, one of the report’s authors.
Mining is prohibited within national parks, but Horwitt says nearby activity can damage ecosystems inside the protected areas. At Bingham mine in Utah, for example, sulphates and heavy metals have escaped and now pollute 72 square miles of groundwater. Mining companies also use cyanide to extract metals such as gold from rocks and this has been known to leak into nearby watercourses.