Solved: The mystery of toxic fracking byproducts
Hydraulic fracturing, also known as “fracking,” relies on water, sand and other chemicals to clear the way for engineers to remove oil or gas from shale — porous rocks below the ground.Engineers know what they are pumping into the ground, but they haven’t understood why they have found certain highly dangerous compounds in flowback — the mixture of water, salt and other chemicals that flows back to the surface after being pumped through the shale.
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