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As fracking booms, growing concerns about wastewater

With hydraulic fracturing for oil and gas continuing to proliferate across the U.S., scientists and environmental activists are raising questions about whether millions of gallons of contaminated drilling fluids could be threatening water supplies and human health.

Try, Try Again

Third time isn’t necessarily the charm for massive open online course instructors, but through a process of trial and error, some faculty members at Stanford University say their MOOCs are living up to (some of) the potential promised two years ago.