State data shows the amount of hydraulic fracturing wastewater pumped underground in Ohio increased by more than 15 percent last year.
The increase comes as drilling for shale in the process known as fracking has slowed nationwide.
State data shows the amount of hydraulic fracturing wastewater pumped underground in Ohio increased by more than 15 percent last year.
The increase comes as drilling for shale in the process known as fracking has slowed nationwide.