Mountains cover 25% of the Earth's surface, and the streams draining these mountains account for more than a third of the global runoff. But the role that mountain streams play in global carbon fluxes ...

Warming temperatures are causing a steady rise in copper, zinc and sulfate in the waters of Colorado mountain streams affected by acid rock drainage. Concentrations of these metals have roughly ...

Iron oxides stain the bed of Upper East Mancos River in southwestern Colorado, an alpine stream affected by acid rock drainage. Concentrations of zinc, copper and sulfate have doubled in the last ...