Reuters: Contaminated water spilling from flooded oil and gas drilling sites in Colorado is refocusing attention on the environmental risks surrounding America's fracking boom.
Floods that have devastated north-central Colorado, killing eight people and displacing thousands, have also dislodged storage tanks that hold drilling wastewater left over from the production process known as hydraulic fracturing, or fracking.
While the impact of leaks is yet to be assessed, environmental groups, which oppose...