Colorado
Colorado's Streams Are Being Loaded With 'Toxic' Heavy Metals
The amount of copper, zinc and sulfate has doubled in the alpine streams flowing from the mountains over the past three decades.
Colorado's mountain streams are facing a "real challenge" from a rising concentration of heavy metal levels.
These rising levels are only worsening with climate change, a new study found.
The amount of copper, zinc and sulfate has doubled in the alpi... [4129 chars]