Pumping water mixed with sand in a fracking operation, for Anadarko in Franktown, Colorado. Denver Post via Getty Images Proppant consists of sand-sized particles injected with frac fluid during a fra...
Pumping water mixed with sand in a fracking operation, for Anadarko in Franktown, Colorado. Denver Post via Getty Images Proppant consists of sand-sized particles injected with frac fluid during a fra...